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.

A239983 Number of nX5 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

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%I A239983 #6 Jun 02 2025 09:36:02
%S A239983 1,6,38,530,7113,83658,1174822,15307425,192702130,2733573580,
%T A239983 34877309132,455831231370,6232060203371,79504957220188,
%U A239983 1061047782962716,14175980247721974,182879377335377352,2451126765466429888
%N A239983 Number of nX5 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.
%C A239983 Column 5 of A239986
%H A239983 R. H. Hardin, <a href="/A239983/b239983.txt">Table of n, a(n) for n = 1..210</a>
%e A239983 Some solutions for n=4
%e A239983 ..3..0..0..0..0....3..0..0..0..0....3..0..0..0..0....3..0..0..0..0
%e A239983 ..2..3..0..0..0....2..1..0..0..0....2..3..0..3..3....2..3..0..3..3
%e A239983 ..2..0..0..3..0....2..0..3..3..3....2..0..0..3..3....2..0..1..2..2
%e A239983 ..2..0..0..0..1....3..0..0..2..2....3..2..0..2..1....2..0..0..1..1
%K A239983 nonn
%O A239983 1,2
%A A239983 _R. H. Hardin_, Mar 30 2014