A221319 Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 6

1, 2, 7, 14, 30, 76, 188, 444, 1071, 2638, 6460, 15756, 38783, 95778, 236270, 584394, 1448972, 3596146, 8935547, 22233108, 55380945, 138076092, 344565415, 860595928, 2151093021, 5380523278, 13467284628, 33729132584, 84523860027, 211927633632

Offset

1,2

Comments

Column 6 of A221321

Links

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

Example

Some solutions for n=9
..0....0....2....2....0....1....1....0....1....1....1....3....0....1....0....2
..1....1....0....1....2....0....2....2....0....0....0....1....1....0....2....3
..0....0....4....2....1....1....0....1....1....2....3....0....0....1....0....0
..2....2....0....0....0....0....1....0....0....1....1....2....2....0....1....1
..3....0....1....2....1....2....2....1....1....0....0....1....1....4....0....0
..0....3....0....0....0....1....1....2....0....3....1....0....0....0....4....2
..1....0....1....1....2....0....0....1....1....0....2....1....4....1....0....0
..0....2....0....0....0....1....2....2....3....2....1....0....0....0....2....1
..2....1....1....1....3....3....0....0....2....0....0....1....1....2....0....0

Crossrefs

Sequence in context: A290519 A120739 A221318 * A221320 A221235 A224916

Adjacent sequences: A221316 A221317 A221318 * A221320 A221321 A221322

Keyword

nonn

Author

R. H. Hardin Jan 10 2013

Status

approved