A248113 Number of subsets of {1,...,n} containing n and having at least one set partition into 4 blocks with equal element sum.

1, 2, 6, 14, 37, 88, 218, 515, 1226, 2848, 6566, 14997, 33483, 74406, 162422, 351621, 751171, 1594028

Offset: 7

Author

Alois P. Heinz, Oct 01 2014

Keywords

• nonn
• more

Examples

			a(7) = 1: {1,2,3,4,5,6,7}-> 16/25/34/7.
a(8) = 2: {1,2,3,5,6,7,8}-> 17/26/35/8, {1,2,3,4,5,6,7,8}-> 18/27/36/45.
		

Crossrefs

Column k=4 of A248112.