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.

A229933 Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).

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%I A229933 #6 Jun 02 2025 08:40:15
%S A229933 63,187211,174306687,183213209145,189537122520529,195955071996200947,
%T A229933 202902063153139301263,210073683026638667977949,
%U A229933 217469679800421836913361917,225130067038542417663060555935
%N A229933 Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).
%C A229933 Column 7 of A229934
%H A229933 R. H. Hardin, <a href="/A229933/b229933.txt">Table of n, a(n) for n = 1..37</a>
%e A229933 Some solutions for n=3
%e A229933 ..0..0..0..0..2..1..1....0..0..0..0..2..1..1....0..0..0..0..0..2..0
%e A229933 ..2..0..2..2..2..0..0....2..0..2..0..1..2..2....2..0..2..1..1..2..0
%e A229933 ..0..0..1..1..1..0..2....0..0..0..2..0..0..2....0..0..2..0..0..2..2
%K A229933 nonn
%O A229933 1,1
%A A229933 _R. H. Hardin_, Oct 04 2013