|
%I #7 Apr 20 2020 00:04:51
%S 1,1,4,17,289,15999,1728734,476725579,338788296901,600144995821877,
%T 2721126689318370799,31005436248594896441733,
%U 885614872309613750483721526,63247599647658758935122240950370,11261549689102506355299411976654023890
%N Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A302150.
%H R. H. Hardin, <a href="/A302145/b302145.txt">Table of n, a(n) for n = 1..16</a>
%e Some solutions for n=5
%e ..0..1..1..1..1. .0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0
%e ..1..1..1..1..1. .1..1..0..0..0. .1..1..0..0..1. .1..1..0..0..1
%e ..1..1..1..1..0. .1..1..0..0..0. .1..1..0..0..0. .1..1..1..0..0
%e ..1..1..0..1..1. .1..1..1..0..0. .1..1..1..0..0. .1..1..0..0..0
%e ..1..1..1..1..0. .1..1..0..0..1. .1..1..0..0..1. .0..1..0..0..1
%Y Cf. A302150.
%K nonn
%O 1,3
%A _R. H. Hardin_, Apr 02 2018
| 