A214047 - OEIS

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A214047

Least m>0 such that n! <= (3/2)^m.

1, 2, 5, 8, 12, 17, 22, 27, 32, 38, 44, 50, 56, 63, 69, 76, 83, 90, 98, 105, 112, 120, 128, 136, 144, 152, 160, 168, 176, 185, 193, 202, 210, 219, 228, 237, 245, 254, 263, 273, 282, 291, 300, 310, 319, 328, 338, 347, 357, 367

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..1000

EXAMPLE

a(6) = 17 because (3/2)^16 < 6! <= (3/2)^17.

MATHEMATICA

Table[m=1; While[n!>(3/2)^m, m++]; m, {n, 1, 100}]

Join[{1}, With[{c=Log[3/2]}, Table[Ceiling[Log[n!]/c], {n, 2, 50}]]] (* Harvey P. Dale, May 15 2013 *)

CROSSREFS

Cf. A003070, A213857.

Sequence in context: A376356 A036789 A330188 * A241566 A002960 A022942

Adjacent sequences: A214044 A214045 A214046 * A214048 A214049 A214050

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jul 18 2012

STATUS

approved