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A212870 Number of nondecreasing sequences of 3 1..n integers with no element dividing the sequence sum 2
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 (list; graph; refs; listen; history; text; internal format)
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

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

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Last modified November 21 04:22 EST 2019. Contains 329350 sequences. (Running on oeis4.)