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.

A222923 Number of nX5 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order.

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%I A222923 #6 Jul 23 2025 03:16:13
%S A222923 41,68076,149478882,352790675074,829048065675262,1950399182366908036,
%T A222923 4587672845137864487256,10791321299165218217699322,
%U A222923 25383677827763449530156884274,59708321150765046377817427875602
%N A222923 Number of nX5 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order.
%C A222923 Column 5 of A222924
%H A222923 R. H. Hardin, <a href="/A222923/b222923.txt">Table of n, a(n) for n = 1..12</a>
%e A222923 Some solutions for n=3
%e A222923 ..0..0..1..1..0....0..0..1..0..2....0..0..1..2..0....0..0..1..0..2
%e A222923 ..0..0..1..0..2....0..0..1..3..0....0..0..1..3..3....0..0..1..0..3
%e A222923 ..2..3..4..2..4....1..3..0..1..1....1..3..4..3..3....1..3..4..1..0
%K A222923 nonn
%O A222923 1,1
%A A222923 _R. H. Hardin_ Mar 09 2013