A302817 - OEIS

%I #6 Dec 29 2023 10:02:51

%S 16,136,731,6905,57684,454733,3825201,32123578,264639685,2203629869,

%T 18405773284,152902334091,1272461654915,10605237319444,88252334653731,

%U 734612128100785,6118284502984008,50933312975687315,424029719529852441

%N Number of n X 5 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 5 of A302820.

%H R. H. Hardin, <a href="/A302817/b302817.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A302820.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 13 2018