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.

A232369 Number of n X n 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.

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%I A232369 #7 Jul 23 2025 07:21:46
%S A232369 1,14,586,63744,27133338,47301712998,319646954776850,
%T A232369 8418146420087467712,876192348419528567402450
%N A232369 Number of n X n 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.
%C A232369 Diagonal of A232376
%e A232369 Some solutions for n=4
%e A232369 ..1..2..3..2....3..2..3..0....2..3..0..3....1..0..3..2....0..3..0..3
%e A232369 ..3..2..3..2....1..0..1..0....0..1..0..2....1..2..1..2....2..1..2..1
%e A232369 ..3..2..3..0....1..0..1..0....3..2..3..2....1..0..1..0....0..1..2..3
%e A232369 ..1..0..1..2....1..2..3..0....3..2..1..2....3..2..1..0....0..3..2..1
%K A232369 nonn
%O A232369 1,2
%A A232369 _R. H. Hardin_, Nov 23 2013

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