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A124657
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Factorials that are abundant numbers.
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0
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24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600, 6227020800, 87178291200, 1307674368000, 20922789888000, 355687428096000, 6402373705728000, 121645100408832000, 2432902008176640000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 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
| 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
| Cf. A000142 Factorial numbers. A005101 Abundant numbers.
Sequence in context: A179720 A052754 A050213 * A052581 A052605 A195917
Adjacent sequences: A124654 A124655 A124656 * A124658 A124659 A124660
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KEYWORD
| nonn
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AUTHOR
| Tanya Khovanova (tanyakh(AT)yahoo.com), Dec 27 2006
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