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.

A302664 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

This page as a plain text file.
%I A302664 #6 Sep 16 2020 18:58:08
%S A302664 0,3,43,934,42367,3640304,637088915,219692176894,138670742999582
%N A302664 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C A302664 Diagonal of A302670.
%e A302664 Some solutions for n=5
%e A302664 ..0..0..1..1..0. .0..1..1..0..0. .0..1..1..0..0. .0..0..1..1..1
%e A302664 ..1..0..1..0..0. .1..0..1..1..0. .1..0..1..0..1. .0..1..0..0..1
%e A302664 ..0..1..1..0..1. .1..0..0..1..1. .0..0..1..1..0. .0..1..1..0..0
%e A302664 ..0..0..0..1..0. .0..1..0..1..0. .0..1..0..0..0. .1..0..1..0..1
%e A302664 ..1..1..1..0..0. .1..1..1..0..1. .1..0..1..1..1. .0..1..0..1..1
%Y A302664 Cf. A302670.
%K A302664 nonn
%O A302664 1,2
%A A302664 _R. H. Hardin_, Apr 11 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.