0,1

The average growth is roughly 10.5*n, and two streaks of subsequences growing roughly proportional to 15.6*n and 5.2*n appear also in the graph.

Table of n, a(n) for n=0..55.

a(n)=A064413(A017377(n)).

Sequence in context: A028569 A014367 A063710 * A242234 A104867 A179877

Adjacent sequences: A157914 A157915 A157916 * A157918 A157919 A157920

nonn

Paul Curtz, Mar 09 2009

Edited and extended by R. J. Mathar, Mar 15 2009

approved