A302284 - OEIS

%I #7 Apr 05 2018 04:08:40

%S 0,421,3401,3316,14639,69601,384916,1354563,4386347,20677591,97720565,

%T 380885387,1475260386,6221755468,27340927933,112702562636,

%U 453867039251,1891967304535,8027410092863,33418076358717,137512996312519

%N Number of 7 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A302278.

%H R. H. Hardin, <a href="/A302284/b302284.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5:

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

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

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

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

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

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

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

%Y Cf. A302278.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 04 2018