Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

0,2

Table of n, a(n) for n=0..15.

For denominators see A157094.

Sequence in context: A013308 A261809 A264723 * A108649 A139858 A139903

Adjacent sequences: A157096 A157097 A157098 * A157100 A157101 A157102

sign,frac

N. J. A. Sloane, Nov 07 2009

approved