A212871 Number of nondecreasing sequences of 4 1..n integers with no element dividing the sequence sum

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

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