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A269288 Number of nX7 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once. 1
8748, 11026764, 10363900428, 8642330207532, 6751724437907820, 5062027330721456172, 3689070798270477232620, 2633315774277280991138604, 1850184391068250712299997676, 1283831257986363807652886516268 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 18 04:34 EDT 2021. Contains 345098 sequences. (Running on oeis4.)