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.

A240373 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one 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 A240373 #6 Jun 02 2025 09:52:00
%S A240373 7,67,450,5161,36398,271764,2492182,17380978,143489019,1182292032,
%T A240373 8603707764,72258762282,564807764665,4330558939711,35641259507701,
%U A240373 274748439605812,2168553682544862,17443667551284635,135153953683819534
%N A240373 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.
%C A240373 Column 4 of A240376
%H A240373 R. H. Hardin, <a href="/A240373/b240373.txt">Table of n, a(n) for n = 1..210</a>
%e A240373 Some solutions for n=4
%e A240373 ..3..3..2..2....3..2..3..3....3..3..2..3....2..2..3..2....2..2..2..2
%e A240373 ..3..1..2..1....3..1..3..1....2..2..0..3....2..1..3..0....2..1..1..0
%e A240373 ..2..2..3..2....2..1..1..0....3..1..0..2....3..3..0..0....3..1..2..1
%e A240373 ..3..1..3..1....3..3..2..3....2..2..2..0....2..0..0..1....3..2..1..2
%K A240373 nonn
%O A240373 1,1
%A A240373 _R. H. Hardin_, Apr 04 2014