OFFSET
1,1
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 1..10000
E. G. Thurber, Addition chains and solutions of l(2n)=l(n) and l(2^n-1)=n+l(n)-1, Discrete Math., Vol. 16 (1976), 279-289.
CROSSREFS
KEYWORD
nonn
AUTHOR
Pontus von Brömssen, Sep 16 2003
STATUS
approved