A302277 - OEIS

A302277

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

%I #7 Apr 05 2018 04:09:28

%S 8,98,363,1621,14125,72083,384916,3027442,17837758,105323556,

%T 739401390,4650704407,28941532526,193466816941,1245437720868,

%U 7947521451749,52140138010011,338093540539006,2181939290185486,14220546200647229

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

%C Column 7 of A302278.

%H R. H. Hardin, <a href="/A302277/b302277.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5:

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

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

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

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

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

%Y Cf. A302278.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 04 2018