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 A297512 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s. 1

%I #4 Dec 31 2017 07:33:36

%S 1,2735,53175,573119,35919085,1272836591,28914051279,949224569894,

%T 32507021089982,940396282368163,28523594741249476,910897573503281049,

%U 27940827448011878850,852581385081080135117,26505475722899552411184

%N Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.

%C Row 7 of A297506.

%H R. H. Hardin, <a href="/A297512/b297512.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

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

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

%Y Cf. A297506.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 31 2017

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Last modified June 5 02:01 EDT 2023. Contains 363130 sequences. (Running on oeis4.)