OFFSET
0,6
LINKS
Wikipedia, Partition of a set
EXAMPLE
a(0) = 1: () the empty partition.
a(3) = 1: 13|2.
a(4) = 1: 124|3.
a(5) = 4: 1235|4, 124|35, 125|34, 13|245.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 17 2023
STATUS
approved