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A198641 Number of 2nX8 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors 0

%I #4 Mar 31 2012 12:36:34

%S 3936,10937316,30189380016,83436203795656,230598746057340176

%N Number of 2nX8 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors

%C Column 4 of A198642

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 27 2011

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Last modified March 4 07:29 EST 2024. Contains 370522 sequences. (Running on oeis4.)