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.

A205414 Number of (n+2)X9 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.

This page as a plain text file.
%I A205414 #6 Jul 22 2025 18:51:04
%S A205414 109757792,8606465750,735422130329,36803297869771,3148208484619590
%N A205414 Number of (n+2)X9 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.
%C A205414 Column 7 of A205415
%e A205414 Some solutions for n=3
%e A205414 ..0..0..1..0..1..2..0..0..0....0..0..0..0..0..0..0..1..0
%e A205414 ..2..0..1..0..1..1..0..1..1....0..0..1..1..2..1..2..1..0
%e A205414 ..1..1..1..0..0..0..0..0..1....0..1..1..1..1..1..1..1..0
%e A205414 ..2..2..1..0..1..1..0..0..1....1..1..1..0..0..0..0..0..0
%e A205414 ..2..0..1..1..1..1..0..1..1....1..1..0..0..0..1..2..1..0
%K A205414 nonn
%O A205414 1,1
%A A205414 _R. H. Hardin_ Jan 26 2012

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

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