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Search: id:A124657
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| A124657 |
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Factorials that are abundant numbers. |
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+0
1
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| 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600, 6227020800, 87178291200, 1307674368000, 20922789888000, 355687428096000, 6402373705728000, 121645100408832000, 2432902008176640000
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OFFSET
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1,1
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COMMENT
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This sequence is the sequence of factorials starting from 24. (It can be easily checked that any number divisible by 12 is abundant.)
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MAPLE
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restart: G(x):=x^4/(1-x): f[0]:=G(x): for n from 1 to 20 do f[n]:=diff(f[n-1], x) od: x:=0: seq(f[n], n=4..20); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 03 2009]
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CROSSREFS
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Cf. A000142 Factorial numbers. A005101 Abundant numbers.
Sequence in context: A052760 A052754 A050213 this_sequence A052581 A052605 A042120
Adjacent sequences: A124654 A124655 A124656 this_sequence A124658 A124659 A124660
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KEYWORD
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nonn
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AUTHOR
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Tanya Khovanova (tanyakh(AT)yahoo.com), Dec 27 2006
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