A212870 Number of nondecreasing sequences of 3 1..n integers with no element dividing the sequence sum.

0, 0, 1, 3, 9, 16, 29, 43, 64, 92, 127, 168, 219, 281, 355, 435, 531, 638, 762, 901, 1057, 1230, 1420, 1628, 1858, 2107, 2380, 2674, 2992, 3338, 3707, 4099, 4524, 4976, 5465, 5975, 6516, 7092, 7704, 8348, 9025, 9744, 10495, 11289, 12125, 12994, 13907, 14859

Offset

1,4

Comments

Row 3 of A212868.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A212868.

Sequence in context: A061942 A174440 A244475 * A306447 A257034 A232167

Adjacent sequences: A212867 A212868 A212869 * A212871 A212872 A212873

Keyword

nonn

Author

R. H. Hardin, May 29 2012

Status

approved