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A002207 Denominators of logarithmic numbers (also of Gregory coefficients G(n)).
(Formerly M2017 N0797)
+0
11
1, 2, 12, 24, 720, 160, 60480, 24192, 3628800, 1036800, 479001600, 788480, 2615348736000, 475517952000, 31384184832000, 689762304000, 32011868528640000, 15613165568, 786014494949376000, 109285437800448000 (list; graph; listen)
OFFSET

-1,2

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

E. Isaacson and H. Bishop, Analysis of Numerical Methods, ISBN 0 471 42865 5, 1966, John Wiley and Sons, pp. 318-319 - Rudi Huysmans (rudi_huysmans(AT)hotmail.com), Apr 10 2000

Charles Jordan, Calculus of Finite Differences, Chelsea 1965, p. 266.

A. N. Lowan and H. Salzer, Table of coefficients in numerical integration formulae, J. Math. Phys., 22 (1943), 49-50.

H. E. Salzer, Table of coefficients for repeated integration with differences, Phil. Mag., 38 (1947), 331-336.

P. C. Stamper, Table of Gregory coefficients, Math. Comp., 20 (1966), 465.

Ming Wu and Hao Pan, Sums of products of Bernoulli numbers of the second kind, Fib. Quart., 45 (2007), 146-150.

LINKS

T. D. Noe, Table of n, a(n) for n=-1..100

G. M. Phillips, Gregory's method for numerical integration, Amer. Math. Monthly, 79 (1972), 270-274.

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Index entries for sequences related to logarithmic numbers

FORMULA

G.f.: 1/log(1+x).

a(n)=A002206(n)/A002207=1/n! sum_{j=1}^{n+1} bernoulli(j)/j S_1(n, j-1), where S_1(n, k) is the Stirling number of the first kind. - Barbara Margolius (b.margolius(AT)csuohio.edu), 1/21/02

G(0)=0, G(n)=Sum_{i=1..n} (-1)^(i+1)*G(n-i)/(i+1)+(-1)^(n+1)*n/(2*(n+1)*(n+2)).

EXAMPLE

Logarithmic numbers are 1, 1/2, -1/12, 1/24, -19/720, 3/160, -863/60480, 275/24192, -33953/3628800, 8183/1036800, -3250433/479001600, 4671/788480, -13695779093/2615348736000, 2224234463/475517952000, ... = A002206/A002207

G(0), G(1), ... = 0, 1/2, -1/12, 1/24, -19/720, 3/160, -863/60480, 275/24192, -33953/3628800, 8183/1036800, -3250433/479001600, 4671/788480, -13695779093/2615348736000, 2224234463/475517952000, ... = A002206/A002207

MAPLE

series(1/log(1+x), x, 25);

with(combinat, stirling1):seq(denom(1/i!*sum(bernoulli(j)/(j)*stirling1(i, j-1), j=1..i+1)), i=1..24);

CROSSREFS

Cf. A002206, A006232, A006233, A002208, A002209, A002657, A002790.

Sequence in context: A052565 A141900 A126962 this_sequence A091137 A092825 A135396

Adjacent sequences: A002204 A002205 A002206 this_sequence A002208 A002209 A002210

KEYWORD

nonn,frac,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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