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.

A222585 Number of nX5 0..2 arrays with no more than floor(nX5/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.

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%I A222585 #6 Jul 23 2025 02:47:58
%S A222585 5,59,426,11442,111951,3778560,41768676,1506610325,17357088679,
%T A222585 636943229353,7432232971076,274815146069546,3227773066527514,
%U A222585 119899193405842577,1414159783426636818,52710154832225023854
%N A222585 Number of nX5 0..2 arrays with no more than floor(nX5/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
%C A222585 Column 5 of A222587
%H A222585 R. H. Hardin, <a href="/A222585/b222585.txt">Table of n, a(n) for n = 1..36</a>
%e A222585 Some solutions for n=3
%e A222585 ..0..1..0..0..0....0..0..0..0..0....0..1..1..1..1....0..0..0..0..0
%e A222585 ..2..0..0..0..0....0..0..0..0..1....2..2..1..1..1....0..0..0..0..1
%e A222585 ..2..2..0..0..0....0..0..0..1..1....2..2..1..1..1....0..0..0..2..2
%K A222585 nonn
%O A222585 1,1
%A A222585 _R. H. Hardin_ Feb 25 2013