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.

A239404 Number of nX7 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it, modulo 4.

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%I A239404 #6 Jun 02 2025 09:27:40
%S A239404 128,44399,15591122,5277728354,1820591502437,630657074443394,
%T A239404 217822754771248124,75263099558825967756,26030827849718972763027,
%U A239404 9004105241933423695032678,3114444338059091764373199789
%N A239404 Number of nX7 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it, modulo 4.
%C A239404 Column 7 of A239405
%H A239404 R. H. Hardin, <a href="/A239404/b239404.txt">Table of n, a(n) for n = 1..210</a>
%e A239404 Some solutions for n=2
%e A239404 ..0..0..0..0..0..0..3....3..1..0..3..3..1..3....3..3..0..0..0..1..3
%e A239404 ..0..3..1..0..0..3..3....2..0..1..2..3..2..0....0..0..0..3..1..2..2
%K A239404 nonn
%O A239404 1,1
%A A239404 _R. H. Hardin_, Mar 17 2014