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.

A240195 Number of 5Xn 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 three plus the sum of the elements diagonally to its northwest, modulo 4.

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%I A240195 #6 Jun 02 2025 09:42:07
%S A240195 7,73,680,7170,91879,1399773,22849697,385366572,6605282704,
%T A240195 114179317079,1982427469366,34498669503396,601074631406014,
%U A240195 10479195138240937,182755667269396463,3187784517998728377,55609182290464067412
%N A240195 Number of 5Xn 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 three plus the sum of the elements diagonally to its northwest, modulo 4.
%C A240195 Row 5 of A240192
%H A240195 R. H. Hardin, <a href="/A240195/b240195.txt">Table of n, a(n) for n = 1..210</a>
%e A240195 Some solutions for n=4
%e A240195 ..2..0..0..0....2..0..0..0....2..0..0..0....2..0..0..0....2..0..0..0
%e A240195 ..1..2..2..0....1..0..0..0....1..0..0..2....1..2..0..2....1..0..2..2
%e A240195 ..2..1..2..0....1..3..3..2....2..3..3..1....2..1..0..0....1..2..0..2
%e A240195 ..1..3..3..0....2..1..2..2....1..2..2..3....1..3..2..0....2..1..1..2
%e A240195 ..1..2..2..2....2..0..0..3....2..1..1..2....2..1..2..0....1..3..3..2
%K A240195 nonn
%O A240195 1,1
%A A240195 _R. H. Hardin_, Apr 02 2014