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 A198510 Number of 2n X 6 0..4 arrays with values 0..4 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors. 0

%I #7 Nov 20 2014 19:19:41

%S 1626,308854,59007820,13127875861,3023133941944,714429326523241,

%T 171400320611391344,41515521989152410680,10116919781533608842706,

%U 2474972835936834280715447

%N Number of 2n X 6 0..4 arrays with values 0..4 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors.

%C Column 3 of A198511.

%e Some solutions for n=4:

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

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

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

%e ..0..0..3..3..0..4....0..0..1..1..0..3....0..0..2..2..0..3....0..0..4..4..0..4

%e ..1..1..3..3..0..4....2..2..1..1..0..3....1..1..2..2..0..3....1..1..4..4..0..4

%e ..2..1..4..4..0..0....4..2..3..3..0..0....0..1..4..4..0..0....2..1..2..2..0..0

%e ..2..1..4..4..1..1....4..2..3..3..1..1....0..1..4..4..3..3....2..1..2..2..3..3

%e ..0..1..2..2..1..0....1..2..4..4..1..0....3..1..2..2..3..2....0..1..4..4..3..0

%Y Cf. A198511.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 25 2011

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Last modified August 5 20:58 EDT 2024. Contains 374956 sequences. (Running on oeis4.)