cp's OEIS Frontend

A218052 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..3 nX4 array.

%I A218052 #6 Jul 22 2025 23:46:39
%S A218052 36,36,1296,9792,114886,1171452,12670594,134406796,1433633158,
%T A218052 15254842534,162467654898,1729976648128,18422895121806,
%U A218052 196181320194934,2089107679946564,22246541273925668,236900028399042908
%N A218052 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random 0..3 nX4 array.
%C A218052 Column 4 of A218056
%H A218052 R. H. Hardin, <a href="/A218052/b218052.txt">Table of n, a(n) for n = 1..128</a>
%e A218052 Some solutions for n=3
%e A218052 ..3..2..2..2....2..2..2..2....1..1..3..3....0..0..1..1....3..2..0..0
%e A218052 ..1..1..1..2....1..1..2..2....0..0..0..2....0..0..1..1....1..1..0..0
%e A218052 ..1..1..1..2....1..1..2..2....0..0..0..2....1..1..3..3....1..1..2..3
%K A218052 nonn
%O A218052 1,1
%A A218052 _R. H. Hardin_ Oct 19 2012