A296540 - OEIS

%I #4 Dec 15 2017 08:48:52

%S 1,45,654,5601,53995,560942,5705431,57470370,581613058,5896361722,

%T 59744304510,605287549399,6133281385115,62150472842382,

%U 629792949015747,6381981797680641,64672057071608258,655359047486913615

%N Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1s.

%C Column 7 of A296541.

%H R. H. Hardin, <a href="/A296540/b296540.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A296541.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 15 2017