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Search: id:A007095
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| A007095 |
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Numbers in base 9.
(Formerly M0490)
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+0
17
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| 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, 64, 65, 66, 67, 68, 70, 71, 72, 73, 74, 75, 76, 77, 78
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Also numbers without 9 as a digit.
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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FORMULA
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a(0)=0 a(n)=10*a(n/9) if n==0 (mod 9) a(n)=a(n-1)+1 otherwise. - Benoit Cloitre, Dec 22, 2002
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MATHEMATICA
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Table[ FromDigits[ IntegerDigits[n, 9]], {n, 0, 75}]
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PROGRAM
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(PARI) a(n)=if(n<1, 0, if(n%9, a(n-1)+1, 10*a(n/9)))
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CROSSREFS
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Cf. A037479, A004183, A004727.
Cf. A037479, A004183, A004727, A000042, A007088, A007089, A007090, A007091, A007092, A007093 & A007094.
Sequence in context: A036741 A037479 A088481 this_sequence A020663 A043094 A023803
Adjacent sequences: A007092 A007093 A007094 this_sequence A007096 A007097 A007098
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KEYWORD
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nonn,base
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Robert G. Wilson v (rgwv(AT)rgwv.com)
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