OFFSET
0,8
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..100
Wikipedia, Partition of a set
FORMULA
a(3) = 1: 123.
a(6) = 1: 123456.
a(7) = 15: 1235|47|6, 123|457|6, 123|47|56, 1357|24|6, 137|245|6, 137|24|56, 15|2347|6, 1|23457|6, 1|2347|56, 15|236|47, 1|2356|47, 1|236|457, 15|24|367, 1|245|367, 1|24|3567.
a(8) = 1: 12345678.
a(9) = 10: 15|24|38|6|79, 1|245|38|6|79, 1|24|358|6|79, 1|24|38|56|79, 1|24|38|579|6, 15|29|38|47|6, 1|259|38|47|6, 1|29|358|47|6, 1|29|38|457|6, 1|29|38|47|56.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Sep 03 2024
STATUS
approved