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Search: id:A143274
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| 1, 6, 15, 32, 50, 84, 112, 160, 207, 270, 319, 420, 481, 574
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OFFSET
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1,2
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FORMULA
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a(n) = n * A006218(n), where A006218(n) = partial sums of d(n). Equals row sums of triangle A143273.
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EXAMPLE
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a(4) = 32 = 4 * A006218(4), where A006218 = (1, 3, 5, 8, 10,...).
a(4) = 32 = sum of row 4 terms of triangle A143273: (4 + 8 + 8 + 12).
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CROSSREFS
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Cf. A000005, A006218, A143273.
Sequence in context: A056497 A092411 A134506 this_sequence A121666 A118734 A051410
Adjacent sequences: A143271 A143272 A143273 this_sequence A143275 A143276 A143277
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 03 2008
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