Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

1,15

Table of n, a(n) for n=1..100.

Sequence in context: A178692 A033666 A139124 * A103284 A071287 A072084

Adjacent sequences: A024157 A024158 A024159 * A024161 A024162 A024163

nonn

Clark Kimberling

approved