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.

A240414 Number of 3Xn 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 A240414 #6 Jun 02 2025 09:56:09
%S A240414 11,33,202,846,3035,17075,65790,283052,1383887,5430572,24942550,
%T A240414 111942189,462444973,2123240962,9194726059,39505113112,178049613558,
%U A240414 765870935841,3356043819951,14873017976807,64294462854133
%N A240414 Number of 3Xn 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 A240414 Row 3 of A240412
%H A240414 R. H. Hardin, <a href="/A240414/b240414.txt">Table of n, a(n) for n = 1..210</a>
%e A240414 Some solutions for n=4
%e A240414 ..2..3..3..2....3..2..3..2....2..3..2..2....3..2..3..3....3..2..3..2
%e A240414 ..1..3..1..2....2..0..3..2....2..1..0..0....2..0..1..1....1..2..1..2
%e A240414 ..2..0..3..2....1..0..0..3....2..3..2..2....1..0..0..0....2..3..2..0
%K A240414 nonn
%O A240414 1,1
%A A240414 _R. H. Hardin_, Apr 04 2014