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A212531 Number of nondecreasing sequences of n 1..n integers with every element dividing the sequence sum 0
1, 2, 5, 10, 21, 40, 83, 161, 331, 644, 1102, 3627, 5646, 10083, 29188, 53681, 84121, 237453, 373114, 1400757, 2443494 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A212536

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

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

CROSSREFS

Sequence in context: A182807 A056599 A191531 * A261681 A030525 A116385

Adjacent sequences:  A212528 A212529 A212530 * A212532 A212533 A212534

KEYWORD

nonn

AUTHOR

R. H. Hardin May 20 2012

STATUS

approved

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Last modified March 26 16:31 EDT 2017. Contains 284137 sequences.