A212869 Number of nondecreasing sequences of n 1..n+1 integers with no element dividing the sequence sum.

0, 1, 3, 15, 52, 199, 722, 2693, 10052, 37344, 141943, 528323, 2020746, 7720299, 29535575, 112041465, 434810382, 1666519344, 6447232492, 24895996003, 96654652273

Offset: 1

Author

R. H. Hardin May 29 2012

Keywords

• nonn

Comments

Superdiagonal 1 of A212868

Examples

			All solutions for n=4
..2....4....3....3....3....2....2....3....3....2....2....4....4....2....2
..2....5....3....3....3....2....2....4....3....5....3....4....4....3....3
..4....5....4....3....5....3....2....5....3....5....4....5....4....3....3
..5....5....4....5....5....4....5....5....4....5....4....5....5....5....3