A281887 - OEIS

A281887

Number of nX7 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

%I #4 Feb 01 2017 09:24:59

%S 0,0,241209,13907664,663476572,29340232714,1239784258612,

%T 50762954675186,2032908127837419,80080573259154704,

%U 3113883115269131234,119819798899454537026,4571113264552325706845,173137719486843965997050

%N Number of nX7 0..1 arrays with no element equal to more than four of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

%C Column 7 of A281888.

%H R. H. Hardin, <a href="/A281887/b281887.txt">Table of n, a(n) for n = 1..68</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A281888.

%K nonn

%O 1,3

%A _R. H. Hardin_, Feb 01 2017