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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.

A184664 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock summing to less than 6.

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%I A184664 #7 Jun 02 2025 03:49:20
%S A184664 150,67330,266060160,11348244616180,4705518067315949795,
%T A184664 19869188673828370548366580,837185450907978354702239657652981
%N A184664 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock summing to less than 6.
%C A184664 Diagonal of A184673
%e A184664 Some solutions for 3X3
%e A184664 ..3..3..1....1..0..1....1..2..2....1..3..3....3..1..3....1..1..3....3..1..2
%e A184664 ..0..3..2....3..3..2....2..1..3....1..2..2....2..3..3....3..3..2....3..2..3
%e A184664 ..3..1..2....3..3..2....2..1..3....2..1..1....1..2..3....2..3..3....3..2..1
%K A184664 nonn
%O A184664 1,1
%A A184664 _R. H. Hardin_ Jan 19 2011

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