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.

A240283 Number of nX6 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 or zero plus the sum of the elements diagonally to its northwest, modulo 4.

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%I A240283 #6 Jun 02 2025 09:46:33
%S A240283 8,741,20764,443168,13490093,281488213,8199368365,225885684501,
%T A240283 5291794810655,154532568331772,3942966914718387,100514669722453440,
%U A240283 2799309114801417209,70561458133827649660,1875054289432696736342
%N A240283 Number of nX6 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 or zero plus the sum of the elements diagonally to its northwest, modulo 4.
%C A240283 Column 6 of A240284
%H A240283 R. H. Hardin, <a href="/A240283/b240283.txt">Table of n, a(n) for n = 1..16</a>
%e A240283 Some solutions for n=3
%e A240283 ..3..3..1..1..3..1....3..1..3..1..3..3....3..1..3..1..3..3....3..3..1..3..1..1
%e A240283 ..3..2..0..0..0..0....2..0..2..2..0..0....3..2..3..2..0..0....2..2..0..2..0..0
%e A240283 ..2..2..0..0..3..2....2..0..0..0..0..0....2..2..2..2..0..0....2..0..0..0..1..2
%K A240283 nonn
%O A240283 1,1
%A A240283 _R. H. Hardin_, Apr 03 2014