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A113015
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Number of decimal digits in B(10^n) where B(k) is the k-th Bell number.
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3
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1, 6, 116, 1928, 27665, 364472, 4547586, 54670463, 639838113, 7338610159, 82857366967
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..10.
Eric Weisstein's World of Mathematics, Bell Number
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FORMULA
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a(n) ~ 10^n * n. - Charles R Greathouse IV, Aug 11 2011
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MATHEMATICA
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f[n_] := Sum[ StirlingS2[n, k], {k, n}]; Table[ Length[ IntegerDigits[ f[10^n]]], {n, 0, 4}] (* Robert G. Wilson v, Oct 12 2005 *)
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CROSSREFS
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Cf. A000110.
Sequence in context: A003425 A052465 A229582 * A024275 A287652 A259064
Adjacent sequences: A113012 A113013 A113014 * A113016 A113017 A113018
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KEYWORD
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nonn,base
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AUTHOR
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Eric W. Weisstein, Oct 10 2005
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EXTENSIONS
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a(5)-a(10) from Charles R Greathouse IV, Aug 11 2011
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STATUS
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approved
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