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.

A240417 Number of 6Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

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%I A240417 #6 Jun 02 2025 09:56:30
%S A240417 129,2105,79090,2051450,45245148,1615637679,38249442962,955439201951,
%T A240417 28422088797325,653249891295733,18365583086851745,495763997190145130,
%U A240417 12117652634246661607,341107664098435880768,8779799870508201530267
%N A240417 Number of 6Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
%C A240417 Row 6 of A240412
%H A240417 R. H. Hardin, <a href="/A240417/b240417.txt">Table of n, a(n) for n = 1..17</a>
%e A240417 Some solutions for n=3
%e A240417 ..2..3..3....3..2..2....2..3..3....3..2..2....2..3..2....3..2..3....3..2..2
%e A240417 ..1..3..2....1..2..0....2..1..1....2..0..1....2..3..2....3..0..1....3..0..0
%e A240417 ..3..0..0....3..0..0....2..3..0....1..0..2....2..1..2....1..2..0....1..0..0
%e A240417 ..2..0..0....3..2..0....2..3..0....2..0..1....2..1..2....1..0..0....3..2..0
%e A240417 ..3..0..0....2..1..0....3..0..0....2..0..0....2..0..0....3..0..2....1..2..2
%e A240417 ..3..1..1....2..1..1....3..2..0....1..0..0....2..0..3....3..0..0....3..2..0
%K A240417 nonn
%O A240417 1,1
%A A240417 _R. H. Hardin_, Apr 04 2014