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.

A241310 Number of 5Xn 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 or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

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%I A241310 #6 Jun 02 2025 10:05:35
%S A241310 57,16,304,1145,6718,49918,283985,1666242,9581018,58628966,324057071,
%T A241310 1715902217,10434282663,59683589128,312272985439,1891207127431,
%U A241310 10449777035931,58705938827485,346683382415999,1902526607149734
%N A241310 Number of 5Xn 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 or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
%C A241310 Row 5 of A241306
%H A241310 R. H. Hardin, <a href="/A241310/b241310.txt">Table of n, a(n) for n = 1..24</a>
%e A241310 Some solutions for n=3
%e A241310 ..3..2..3....3..2..3....3..2..2....2..3..3....2..3..2....3..2..3....2..3..2
%e A241310 ..3..1..1....1..0..3....3..1..1....2..1..1....2..3..2....1..2..1....2..3..2
%e A241310 ..1..2..2....2..0..1....1..2..1....3..0..2....3..1..2....3..0..2....3..1..2
%e A241310 ..1..3..2....1..0..2....2..0..3....3..0..1....2..1..1....3..0..2....2..1..2
%e A241310 ..3..0..2....3..0..1....3..1..2....1..0..2....1..0..2....1..0..2....1..0..3
%K A241310 nonn
%O A241310 1,1
%A A241310 _R. H. Hardin_, Apr 18 2014