Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #7 Apr 19 2020 23:54:10
%S 1,11,228,16524,4254377,3553672817,10046940260800,95593682736547484,
%T 3048748598852691707372,326806923379819512235330165,
%U 117671612236955708975981838902711
%N Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 3 neighboring 1's.
%C Diagonal of A296599.
%H R. H. Hardin, <a href="/A296592/b296592.txt">Table of n, a(n) for n = 1..12</a>
%e Some solutions for n=4
%e ..0..0..0..1. .0..1..1..0. .1..0..0..0. .0..0..0..0. .1..0..1..0
%e ..1..0..1..1. .0..0..1..1. .1..0..1..0. .1..0..1..1. .1..0..1..0
%e ..1..0..0..1. .0..1..0..1. .1..0..1..1. .1..0..1..0. .1..0..1..0
%e ..0..0..1..1. .1..0..1..1. .1..1..0..1. .1..1..0..0. .0..1..1..1
%Y Cf. A296599.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 16 2017