A286978 - OEIS

%I #6 Apr 05 2020 23:31:07

%S 3,2088,238532,27938670,3229944132,382399996325,45587718323826,

%T 5491408595796062,665386690317576640,81085002249528800607,

%U 9923283116879850553806,1218979761697887011274578

%N Number of n X 7 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

%C Column 7 of A286979.

%H R. H. Hardin, <a href="/A286978/b286978.txt">Table of n, a(n) for n = 1..16</a>

%e Some solutions for n=2

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

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

%Y Cf. A286979.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 17 2017