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A210347 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences 0

%I

%S 40,13566,38415623,934012605398,193382034306882852,

%T 341167083547574037214431,5125371159957295208758939227336,

%U 655672443742537489846231752745295823823

%N 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences

%C Diagonal of A210355

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 20 2012

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Last modified October 17 05:00 EDT 2021. Contains 348048 sequences. (Running on oeis4.)