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.

A230673 Number of nX6 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

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%I A230673 #6 Jun 02 2025 08:45:04
%S A230673 33,21933,6081561,1844154933,559929294657,169908632412447,
%T A230673 51564141085334199,15648664251672721725,4749050405190938157075,
%U A230673 1441240135293669121537797,437387035655507564724178683
%N A230673 Number of nX6 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).
%C A230673 Column 6 of A230675
%H A230673 R. H. Hardin, <a href="/A230673/b230673.txt">Table of n, a(n) for n = 1..191</a>
%e A230673 Some solutions for n=3
%e A230673 ..0..0..0..1..2..0....0..0..0..0..0..2....0..0..0..0..1..1....0..0..0..0..2..1
%e A230673 ..0..2..2..1..1..0....1..2..2..2..1..2....1..2..2..2..2..1....0..2..2..2..1..2
%e A230673 ..0..0..0..1..2..0....1..1..0..0..1..1....1..1..0..1..1..0....2..0..2..1..0..2
%K A230673 nonn
%O A230673 1,1
%A A230673 _R. H. Hardin_, Oct 27 2013