OFFSET
0,2
COMMENTS
Indexing starts with zero, because a(0) = 0 (indicating an identity permutation) is a special case in this sequence.
LINKS
PROG
(Scheme, with Antti Karttunen's IntSeq-library)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 10 2016
STATUS
approved