A212531 Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum.

1, 2, 5, 10, 21, 40, 83, 161, 331, 644, 1102, 3627, 5646, 10083, 29188, 53681, 84121, 237453, 373114, 1400757, 2443494

Offset: 1

Author

R. H. Hardin May 20 2012

Keywords

• nonn

Comments

Diagonal of A212536

Examples

			Some solutions for n=8
..1....2....2....2....1....1....1....1....2....1....1....1....4....6....1....2
..1....2....2....2....1....1....4....1....2....1....1....2....7....6....2....2
..2....2....2....2....4....2....4....1....4....1....1....2....7....6....3....2
..2....2....3....2....5....4....5....3....4....2....1....2....7....6....3....3
..4....2....5....2....5....4....5....3....4....3....2....3....7....6....3....3
..4....2....5....4....8....4....5....3....8....4....2....4....8....6....3....4
..7....4....5....7....8....4....8....6....8....4....2....4....8....6....3....4
..7....4....6....7....8....4....8....6....8....8....2....6....8....6....6....4