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 A295269 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1's. 1

%I

%S 2,11,164,6659,748740,230659662,196091375073,458510348625561,

%T 2951683183977839155,52303382279027148884728,

%U 2551191530898428081696382880,342537007989863347885673784022387

%N Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1's.

%C Diagonal of A295275.

%H R. H. Hardin, <a href="/A295269/b295269.txt">Table of n, a(n) for n = 1..14</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A295275.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2017

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Last modified December 5 20:39 EST 2021. Contains 349558 sequences. (Running on oeis4.)