A131138 a(n)=log_3(A131137(n)).

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

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: A074065 A024811 A284006 * A284724 A189579 A278617

Adjacent sequences: A131135 A131136 A131137 * A131139 A131140 A131141

Keyword

easy,nonn

Author

Paul Barry, Jun 17 2007

Status

approved