# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a283955 Showing 1-1 of 1 %I A283955 #4 Mar 18 2017 12:29:27 %S A283955 0,0,71486,4510608,242330064,13010689912,667015216686,32960788748780, %T A283955 1600697201681958,76611709398415200,3619757534989162198, %U A283955 169346455636754049580,7859113340842715699470,362219493645285494837272 %N A283955 Number of 6Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element. %C A283955 Row 6 of A283950. %H A283955 R. H. Hardin, Table of n, a(n) for n = 1..210 %e A283955 Some solutions for n=3 %e A283955 ..1..1..1. .1..1..0. .1..0..0. .1..1..1. .1..1..0. .0..0..1. .0..0..1 %e A283955 ..0..1..1. .1..0..1. .0..0..0. .1..1..0. .1..0..1. .0..0..1. .0..0..1 %e A283955 ..1..0..1. .1..1..1. .0..1..1. .0..0..1. .1..1..0. .0..1..1. .1..1..1 %e A283955 ..0..0..1. .1..1..0. .1..1..1. .1..0..0. .0..0..1. .0..0..1. .0..1..1 %e A283955 ..1..0..0. .0..0..0. .1..0..0. .1..1..1. .1..0..0. .1..0..1. .0..0..0 %e A283955 ..0..0..1. .1..0..1. .1..0..0. .0..0..0. .1..0..0. .1..1..1. .1..1..0 %Y A283955 Cf. A283950. %K A283955 nonn %O A283955 1,3 %A A283955 _R. H. Hardin_, Mar 18 2017 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE