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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.

A184206 Number of (n+1)X9 binary arrays with no 2X2 subblock containing fewer than two 1s.

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%I A184206 #7 Jul 22 2025 09:30:02
%S A184206 31707,4556371,518574936,64377477751,7795714368919,952294826074262,
%T A184206 116023864377980183,14148460147460008963,1724850427268614620086,
%U A184206 210297145807804211632731,25639101187522824504622401
%N A184206 Number of (n+1)X9 binary arrays with no 2X2 subblock containing fewer than two 1s.
%C A184206 Column 8 of A184207
%H A184206 R. H. Hardin, <a href="/A184206/b184206.txt">Table of n, a(n) for n = 1..200</a>
%e A184206 Some solutions for 3X9
%e A184206 ..0..0..0..0..1..0..0..1..1....0..0..0..1..0..0..1..0..1
%e A184206 ..1..1..1..1..1..1..1..0..0....1..1..1..0..1..1..1..1..0
%e A184206 ..1..0..0..0..0..1..1..1..1....0..0..1..1..0..1..1..0..1
%K A184206 nonn
%O A184206 1,1
%A A184206 _R. H. Hardin_ Jan 10 2011

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