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.

A199125 Number of n X n 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.

This page as a plain text file.
%I A199125 #8 Jul 22 2025 13:10:29
%S A199125 1,2,6,258,11475,438502,358599045,247746055048,141388449764548
%N A199125 Number of n X n 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.
%C A199125 Diagonal of A199133
%e A199125 Some solutions for n=5
%e A199125 ..0..1..0..1..0....0..1..2..1..2....0..1..2..1..2....0..1..0..2..1
%e A199125 ..2..0..1..0..2....2..0..1..0..1....1..2..1..2..0....1..0..2..0..2
%e A199125 ..1..2..0..2..1....0..2..0..1..2....2..0..2..0..1....0..2..1..2..1
%e A199125 ..0..1..2..1..2....1..0..2..0..1....0..2..1..2..0....1..0..2..1..0
%e A199125 ..1..2..0..2..1....2..1..0..2..0....1..0..2..0..1....0..2..1..0..2
%K A199125 nonn
%O A199125 1,2
%A A199125 _R. H. Hardin_ Nov 03 2011

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

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