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A113015
Number of decimal digits in B(10^n) where B(k) is the k-th Bell number.
3
1, 6, 116, 1928, 27665, 364472, 4547586, 54670463, 639838113, 7338610159, 82857366967
OFFSET
0,2
LINKS
Eric Weisstein's World of Mathematics, Bell Number
FORMULA
a(n) ~ 10^n * n. - Charles R Greathouse IV, Aug 11 2011
MATHEMATICA
f[n_] := Sum[ StirlingS2[n, k], {k, n}]; Table[ Length[ IntegerDigits[ f[10^n]]], {n, 0, 4}] (* Robert G. Wilson v, Oct 12 2005 *)
CROSSREFS
Cf. A000110.
Sequence in context: A003425 A052465 A229582 * A362765 A024275 A287652
KEYWORD
nonn,base
AUTHOR
Eric W. Weisstein, Oct 10 2005
EXTENSIONS
a(5)-a(10) from Charles R Greathouse IV, Aug 11 2011
STATUS
approved