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A295274 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s. 2

%I #4 Nov 19 2017 08:18:01

%S 81,2570,99245,3697742,139221499,5221177246,196091375073,

%T 7361533108317,276386201580189,10376697508977992,389585088134351369,

%U 14626667590533685932,549146940474831592906,20617295057949494189434

%N Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s.

%C Column 7 of A295275.

%H R. H. Hardin, <a href="/A295274/b295274.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A295275.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2017

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)