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.

A209741 Number of nX5 0..5 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..5 introduced in row major order.

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%I A209741 #7 Jul 22 2025 21:56:41
%S A209741 52,10594,6262064,4474325828,3309942226828,2462887498725440,
%T A209741 1834383283218723590,1366486932112899379170,1017964144833296194871291,
%U A209741 758335528163948847329102970,564924804927465477617885477572
%N A209741 Number of nX5 0..5 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..5 introduced in row major order.
%C A209741 Column 5 of A209744
%H A209741 R. H. Hardin, <a href="/A209741/b209741.txt">Table of n, a(n) for n = 1..210</a>
%e A209741 Some solutions for n=5
%e A209741 ..0..0..0..0..1....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
%e A209741 ..1..2..3..1..2....1..2..1..2..1....1..2..1..2..1....1..2..1..2..3
%e A209741 ..0..0..3..0..0....0..0..0..0..0....1..3..3..1..3....4..1..3..1..1
%e A209741 ..1..2..0..4..1....1..2..1..2..1....3..0..1..4..1....3..1..0..0..2
%e A209741 ..4..2..5..4..5....0..0..1..0..0....4..0..2..4..5....5..5..5..4..0
%K A209741 nonn
%O A209741 1,1
%A A209741 _R. H. Hardin_ Mar 12 2012