cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A303519 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

This page as a plain text file.
%I A303519 #6 Sep 16 2020 19:06:03
%S A303519 1,3,18,103,1758,102779,15768709,6835357512,8858057538977
%N A303519 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C A303519 Diagonal of A303525.
%e A303519 Some solutions for n=5
%e A303519 ..0..1..1..0..1. .0..1..1..1..0. .0..1..1..1..0. .0..1..1..0..1
%e A303519 ..1..0..1..0..1. .1..1..1..1..1. .0..1..0..1..0. .1..1..1..1..0
%e A303519 ..1..0..1..0..1. .0..1..1..1..0. .1..1..1..1..1. .0..1..1..1..1
%e A303519 ..1..0..1..1..1. .0..1..0..1..0. .1..1..0..1..1. .0..0..0..1..1
%e A303519 ..1..0..0..0..1. .0..1..0..0..0. .0..1..0..1..0. .0..1..0..1..0
%Y A303519 Cf. A303525.
%K A303519 nonn
%O A303519 1,2
%A A303519 _R. H. Hardin_, Apr 25 2018

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.