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A131138 a(n)=log_3(A131137(n)). 1
0, 1, 2, 3, 3, 4, 5, 5, 6, 7, 6, 7, 8, 8, 9, 10, 10, 11, 12, 11, 12, 13, 13, 14, 15, 15, 16, 17, 15, 16, 17, 17, 18, 19, 19, 20, 21, 20, 21, 22, 22, 23, 24, 24, 25, 26, 25, 26, 27, 27, 28, 29, 29, 30, 31, 29, 30, 31, 31, 32, 33, 33, 34, 35, 34, 35, 36, 36 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..67.

PROG

(PARI) a(n)=if(n<4, n, valuation(denominator(polylog(1-n, 1/4)/4), 3)) \\ Charles R Greathouse IV, Jul 15 2014

CROSSREFS

Sequence in context: A039729 A074065 A024811 * A189579 A194640 A189726

Adjacent sequences:  A131135 A131136 A131137 * A131139 A131140 A131141

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jun 17 2007

STATUS

approved

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Last modified December 18 19:05 EST 2014. Contains 252174 sequences.