A269288 Number of nX7 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.

8748, 11026764, 10363900428, 8642330207532, 6751724437907820, 5062027330721456172, 3689070798270477232620, 2633315774277280991138604, 1850184391068250712299997676, 1283831257986363807652886516268

Offset

1,1

Comments

Column 7 of A269289.

Links

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

Formula

Empirical: a(n) = 1384*a(n-1) -566002*a(n-2) +61993580*a(n-3) -3083170217*a(n-4) +82564587476*a(n-5) -1288497445564*a(n-6) +12048887832352*a(n-7) -66380108132464*a(n-8) +198314583195456*a(n-9) -247475435747904*a(n-10) for n>11

Example

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

Crossrefs

Cf. A269289.

Sequence in context: A269142 A269200 A269108 * A234148 A205254 A061665

Adjacent sequences: A269285 A269286 A269287 * A269289 A269290 A269291

Keyword

nonn

Author

R. H. Hardin, Feb 21 2016

Status

approved