OFFSET
0,3
COMMENTS
Indexing starts from zero because a(0)=0 is a special case in this sequence.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..120
PROG
(Scheme, with Antti Karttunen's IntSeq-library)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 03 2016
STATUS
approved