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.

A221204 Number of 5Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.

This page as a plain text file.
%I A221204 #7 Jun 02 2025 08:11:59
%S A221204 0,1681,976,20277009,433687328,420771471561,29037336149952,
%T A221204 10986555692499984
%N A221204 Number of 5Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.
%C A221204 Row 5 of A221200
%e A221204 Some solutions for n=3
%e A221204 ..2..2..0....0..2..0....0..2..1....1..2..1....0..2..1....0..2..0....0..2..0
%e A221204 ..1..2..0....1..2..1....1..2..0....1..2..0....0..2..0....2..2..0....2..2..1
%e A221204 ..0..2..1....0..2..0....1..2..0....0..2..1....1..2..1....1..2..1....1..2..0
%e A221204 ..0..2..0....0..2..1....0..2..0....0..2..1....1..2..0....0..2..1....0..2..0
%e A221204 ..0..2..1....2..2..0....1..2..1....0..2..0....0..2..1....0..2..0....1..2..0
%K A221204 nonn
%O A221204 1,2
%A A221204 _R. H. Hardin_ Jan 04 2013

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

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