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A229316 Number of nX3 0..3 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X4 0..3 array without adjacent equal elements in the latter.

%I A229316 #6 Jul 23 2025 05:40:13
%S A229316 50,1494,34022,717882,14972226,310664552,6441333794,133479301256,
%T A229316 2765778769420,57304490833172,1187283470159260,24598916041468848,
%U A229316 509655373324270570,10559338935801406840,218774498705110449478
%N A229316 Number of nX3 0..3 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X4 0..3 array without adjacent equal elements in the latter.
%C A229316 Column 3 of A229320
%H A229316 R. H. Hardin, <a href="/A229316/b229316.txt">Table of n, a(n) for n = 1..122</a>
%e A229316 Some solutions for n=3
%e A229316 ..0..3..0....2..2..2....2..1..1....0..1..3....0..3..0....3..2..0....1..1..1
%e A229316 ..3..0..2....2..1..1....2..2..0....1..3..2....3..1..1....2..2..2....2..2..3
%e A229316 ..2..1..0....2..3..0....3..0..3....1..2..2....1..1..1....2..2..1....2..1..0
%K A229316 nonn
%O A229316 1,1
%A A229316 _R. H. Hardin_ Sep 19 2013