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Search: id:A009551
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| A009551 |
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Expansion of sin(x)/(1-x). |
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+0
2
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| 0, 1, 2, 5, 20, 101, 606, 4241, 33928, 305353, 3053530, 33588829, 403065948, 5239857325, 73358002550, 1100370038249, 17605920611984, 299300650403729, 5387411707267122, 102360822438075317, 2047216448761506340
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n) = round(n!*sin(1)), n>=1. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Aug 11 2002
a(n) = n! * sum{k=0, [n/2], (-1)^k/(2k-1)!}, n>0. - Ralf Stephan, Apr 16 2004
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MATHEMATICA
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Sin[ x ]/(1-x)
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PROGRAM
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(PARI) a(n) = round(n!*sin(1))
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CROSSREFS
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Sequence in context: A074415 A020001 A039909 this_sequence A006924 A006867 A019536
Adjacent sequences: A009548 A009549 A009550 this_sequence A009552 A009553 A009554
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin (rhh(AT)cadence.com)
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EXTENSIONS
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More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 13 2002
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