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A297504 Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s. 1

%I #4 Dec 31 2017 07:26:57

%S 21,729,8803,191192,3624914,66289769,1272836591,23896899569,

%T 450529429259,8509989217247,160423654526876,3026744089971807,

%U 57099188342748031,1077069529621543033,20318551052028606846,383290619891741250595

%N Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.

%C Column 6 of A297506.

%H R. H. Hardin, <a href="/A297504/b297504.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..0..0..0..1..0..0. .0..0..0..0..1..1. .0..1..1..1..0..0. .1..1..1..0..1..0

%e ..0..0..1..0..0..1. .0..0..1..0..0..0. .0..0..0..0..1..1. .0..0..0..0..1..1

%e ..0..0..0..0..1..1. .0..1..1..0..0..0. .0..1..0..0..0..0. .0..1..0..0..0..0

%e ..0..1..1..0..1..0. .0..0..0..1..0..0. .1..0..0..1..1..1. .0..1..1..0..0..0

%Y Cf. A297506.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 31 2017

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)