A296642 - OEIS

%I #4 Dec 17 2017 15:12:01

%S 37,2728,89613,3713779,157255466,6468185511,267838310277,

%T 11100574753607,459672982178410,19037726114800043,788497459189867140,

%U 32656946891818303362,1352543183239264781440,56018002075733378064056

%N Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 4 neighboring 1s.

%C Column 7 of A296643.

%H R. H. Hardin, <a href="/A296642/b296642.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A296643.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2017