|
%I #3 Dec 09 2015 13:52:21
%S 79,0,2506,3249,0,7928582,223328748,0,1549060833483,39333115954893,0,
%T 2109288411348207682,326185610259705685656,0,
%U 3328201162998337468944458,312377463730842740280530334,0,2511537812294356287514629641154
%N Number of nX6 0..n*6-1 arrays with upper left zero and lower right n*6-1 and each element differing from its horizontal, vertical and diagonal neighbors by a power of two.
%C Column 6 of A265494.
%e Some solutions for n=4
%e ..0.16.14.12.13.11....0.16.14.15.13.11....0.16.14.15.19.23....0.16.14.15.19.20
%e .16..8.12.13.11..9....4..8.12.13.11.15...16..8.12.13.11.15....4..8.12.13.17.18
%e ..8.12.10.11.15..7....8.12.10.11.15.19...14.12.10.11.15.19....8.12.10.11.15.19
%e ..6..4..8..9..7.23....0.16..8..9..7.23...12.16..8..9..7.23....6..4..8..9..7.23
%Y Cf. A265494.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 09 2015
| 