OFFSET
6,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 6..220
Wikipedia, Partition of a set
EXAMPLE
a(6) = 1: 136|25|4.
a(7) = 21: 1247|36|5, 1347|26|5, 1357|246, 135|247|6, 137|246|5, 1367|25|4, 136|257|4, 136|25|47, 136|25|4|7, 137|256|4, 13|257|46, 13|25|47|6, 137|26|45, 13|27|46|5, 147|236|5, 157|246|3, 15|247|36, 15|24|37|6, 17|246|35, 1|247|36|5, 17|26|35|4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 26 2016
STATUS
approved