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Search: id:A063979
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| 1, 1, 1, 3, 24, 199, 1747, 16474, 168187, 1859934, 22228104, 286078171, 3949867548, 58284826485, 915905054360, 15276520209206, 269617872744249, 5021159048900643, 98417586560408168, 2025488254833817394, 43675043585825292775
(list; graph; listen)
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OFFSET
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0,4
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LINKS
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Jon Schoenfield, Table of n, a(n) for n=0,...,30
Eric Weisstein's World of Mathematics, Factorial
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MAPLE
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seq(length((n)!!), n=0..19); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 10 2007
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MATHEMATICA
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Do[ Print[ Floor[ N[ Log[10, (n!)! ], 24] + 1]], {n, 0, 11} ]
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PROGRAM
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(PARI, using 40 digits of precision) f(n)=a=n!; return(floor((a*log(a)-a+1/2*log(2*Pi*a)+1/(12*a))/log(10)+1) (from Robert Gerbicz, Jul 08 2008)
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CROSSREFS
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Cf. A000197, A063944, A034886.
Sequence in context: A037657 A074580 A163473 this_sequence A073978 A000279 A001099
Adjacent sequences: A063976 A063977 A063978 this_sequence A063980 A063981 A063982
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 05 2001
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 06 2001
A correspondent reported that terms a(17) - a(19) shown here were wrong. That's not true, they are correct. The correspondent was using python, where the default precision was not large enough to calculate these terms correctly. Thanks to Brendan McKay, Max Alekseyev and Robert Gerbicz for confirming the entries. - N. J. A. Sloane (njas(AT)research.att.com), Jul 08 2008.
a(20) from Brendan McKay, Jul 08 2008
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