OFFSET
9,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 9..220
Wikipedia, Partition of a set
EXAMPLE
a(9) = 4: 1369|258|47, 136|259|48|7, 139|258|47|6, 159|248|37|6.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 26 2016
STATUS
approved