A245956 Number of length 6+3 0..n arrays with some pair in every consecutive four terms totalling exactly n

298, 11441, 88804, 525041, 1744494, 5208673, 12257032, 27206945, 53051890, 99643601, 172531308, 290962321, 464076214, 725751041, 1089854224, 1611694913, 2311078842, 3273303025, 4525364980, 6193054001, 8311825918, 11060605601

Offset

1,1

Comments

Row 6 of A245950

Links

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

Formula

Empirical: a(n) = 3*a(n-1) +2*a(n-2) -14*a(n-3) +5*a(n-4) +25*a(n-5) -20*a(n-6) -20*a(n-7) +25*a(n-8) +5*a(n-9) -14*a(n-10) +2*a(n-11) +3*a(n-12) -a(n-13)

Example

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

Crossrefs

Sequence in context: A186126 A129037 A249296 * A235229 A064908 A341189

Adjacent sequences: A245953 A245954 A245955 * A245957 A245958 A245959

Keyword

nonn

Author

R. H. Hardin, Aug 08 2014

Status

approved