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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

%I

%S 8748,11026764,10363900428,8642330207532,6751724437907820,

%T 5062027330721456172,3689070798270477232620,2633315774277280991138604,

%U 1850184391068250712299997676,1283831257986363807652886516268

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

%C Column 7 of A269289.

%H R. H. Hardin, <a href="/A269288/b269288.txt">Table of n, a(n) for n = 1..210</a>

%F 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

%e Some solutions for n=1

%e ..2..1..1..1..1..3..1. .0..3..3..1..1..1..1. .2..0..2..1..1..0..0

%Y Cf. A269289.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 21 2016

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Last modified July 30 07:58 EDT 2021. Contains 346348 sequences. (Running on oeis4.)