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.

A199130 Number of nX5 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 A199130 #7 Jul 22 2025 13:10:59
%S A199130 6,30,70,1409,11475,33970,887966,8181546,26354800,739462036,
%T A199130 7166709232,23742940530,690068431668,6837489856538,23031293598718,
%U A199130 682253330136338,6857414650447522,23326710623207736,700022706564351432
%N A199130 Number of nX5 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 A199130 Column 5 of A199133
%H A199130 R. H. Hardin, <a href="/A199130/b199130.txt">Table of n, a(n) for n = 1..48</a>
%e A199130 Some solutions for n=6
%e A199130 ..0..1..2..1..2....0..1..2..1..0....0..1..0..2..0....0..1..0..1..0
%e A199130 ..1..2..1..0..1....2..0..1..0..2....1..2..1..0..2....1..0..1..0..1
%e A199130 ..0..1..0..2..0....0..1..2..1..0....0..1..0..2..0....2..1..2..1..2
%e A199130 ..2..0..2..1..2....1..2..1..0..1....1..2..1..0..1....1..2..0..2..0
%e A199130 ..0..2..0..2..1....2..0..2..1..2....2..0..2..1..2....2..1..2..0..2
%e A199130 ..1..0..2..1..0....0..2..1..2..0....1..2..0..2..1....0..2..1..2..0
%K A199130 nonn
%O A199130 1,1
%A A199130 _R. H. Hardin_ Nov 03 2011