OFFSET
0,2
COMMENTS
We start indexing of this sequence from 0, because a(0) = 0 is a special case, which can be conveniently ignored by considering only the terms from a(1) onward.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..8433
FORMULA
PROG
(Scheme, with Antti Karttunen's IntSeq-library)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 12 2015
STATUS
approved