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 A210141 Number of (n+1)X7 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, two or four distinct values, and new values 0..3 introduced in row major order 1

%I

%S 77934,21511540,5714971168,1499212226898,389550973002670,

%T 100540191960863826,25825997316374317466,6612514023912830466845,

%U 1689392659558935537327585,430991542000743763901193762

%N Number of (n+1)X7 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, two or four distinct values, and new values 0..3 introduced in row major order

%C Column 6 of A210143

%H R. H. Hardin, <a href="/A210141/b210141.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..0..0..0..1..0..0..0....0..1..1..2..1..1..2....0..0..1..0..0..0..2

%e ..1..0..2..3..2..2..2....1..0..0..3..0..0..3....3..3..2..3..0..1..3

%e ..2..3..1..0..1..1..1....1..1..1..2..1..0..3....0..0..1..0..0..1..1

%e ..0..1..3..2..3..1..3....0..0..0..3..0..0..3....2..0..0..0..1..0..0

%e ..2..3..3..2..3..3..3....3..3..3..0..3..0..3....2..2..0..2..3..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 17 2012

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Last modified January 28 20:05 EST 2022. Contains 350657 sequences. (Running on oeis4.)