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A212871 Number of nondecreasing sequences of 4 1..n integers with no element dividing the sequence sum 2
0, 0, 1, 5, 15, 29, 59, 103, 168, 259, 386, 553, 772, 1043, 1401, 1832, 2356, 2980, 3729, 4622, 5680, 6872, 8263, 9872, 11716, 13767, 16122, 18765, 21707, 25010, 28650, 32686, 37173, 42036, 47466, 53375, 59783, 66728, 74355, 82632, 91519, 101150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Row 4 of A212868

LINKS

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

EXAMPLE

Some solutions for n=8

..2....3....4....3....4....3....2....4....4....2....2....3....4....2....2....2

..3....3....7....5....5....3....5....4....6....3....4....5....6....2....5....5

..6....5....7....7....5....4....6....5....7....4....5....5....8....3....5....5

..8....5....7....7....5....7....8....6....8....8....8....6....8....4....7....5

CROSSREFS

Sequence in context: A268581 A298025 A162525 * A188350 A268222 A285630

Adjacent sequences:  A212868 A212869 A212870 * A212872 A212873 A212874

KEYWORD

nonn

AUTHOR

R. H. Hardin May 29 2012

STATUS

approved

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Last modified December 6 21:48 EST 2019. Contains 329809 sequences. (Running on oeis4.)