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Number of n X 7 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
1

%I #6 Apr 20 2021 14:55:34

%S 15,277,8068,226771,5870751,144819856,3444870482,79672440007,

%T 1801951754910,40020022178950,875485447655303,18909516686710743,

%U 403990472666974061,8549840572786983933,179455644823143101693

%N Number of n X 7 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%C Column 7 of A279977.

%H R. H. Hardin, <a href="/A279976/b279976.txt">Table of n, a(n) for n = 1..82</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A279977.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 24 2016