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.

A183816 1/81 the number of (n+1)X6 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.

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%I A183816 #6 Jul 22 2025 09:12:09
%S A183816 4096,1321860,414246824,131467169720,41531687999736,13143529051807800,
%T A183816 4156740912572653752
%N A183816 1/81 the number of (n+1)X6 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
%C A183816 Column 5 of A183819
%e A183816 Some solutions with upper left block zero for 3X6
%e A183816 ..0..0..0..0..1..2....0..0..0..0..1..2....0..0..0..0..0..2....0..0..0..0..2..0
%e A183816 ..0..0..1..1..1..2....0..0..1..2..2..0....0..0..1..2..2..0....0..0..2..1..1..0
%e A183816 ..0..1..2..2..1..0....1..2..1..0..2..1....2..1..1..1..2..0....1..1..2..0..1..2
%K A183816 nonn
%O A183816 1,1
%A A183816 _R. H. Hardin_ Jan 07 2011

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