OFFSET
1,1
COMMENTS
sp(1..9)=4,6,9,10,14,15,21,22,25, with the convention that sp(0)=1.
LINKS
David Applegate, Table of n, a(n) for n = 1..300
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Zak Seidov, Feb 17 2008
EXTENSIONS
Corrected and extended by David Applegate, Feb 18 2008
STATUS
approved