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Search: id:A062569
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| 1, 1, 3, 12, 60, 360, 2418, 19344, 159120, 1481040, 15334088, 184009056, 2217441408, 31044179712, 442487616480, 6686252969760, 107004539285280, 1926081707135040, 34683832925921088, 693676658518421760
(list; graph; listen)
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OFFSET
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0,3
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MAPLE
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with(numtheory):seq(sigma(n!), n=0..19); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 15 2008
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MATHEMATICA
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Array[DivisorSigma[1, #! ]&, 33, 1] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 01 2009]
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PROGRAM
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(PARI) for(n=0, 21, print(sigma(n!)))
(Other) sage: [sigma(factorial(n), 1)for n in xrange(0, 20)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 13 2009]
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CROSSREFS
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Sequence in context: A105227 A000258 A070863 this_sequence A089057 A077134 A001710
Adjacent sequences: A062566 A062567 A062568 this_sequence A062570 A062571 A062572
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 03 2001
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