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A231061 Number of nX6 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1
0, 230, 7818, 313944, 12582344, 505135612, 20286249268, 814871303100, 32735101347962, 1315094209121840, 52833398277964844, 2122581619644690616, 85275101975137588046, 3425950358334849580350, 137638633914499167727240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A231063

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..123

EXAMPLE

Some solutions for n=4

..0..1..2..0..3..2....0..1..0..3..0..1....0..1..0..3..2..1....0..1..0..2..1..0

..3..0..3..1..0..3....1..2..3..2..1..2....1..2..3..2..1..0....3..2..1..3..2..1

..0..1..0..2..3..2....0..1..0..3..2..3....0..1..0..1..0..3....2..1..3..0..1..0

..3..2..1..0..2..1....1..2..3..0..1..0....3..2..3..0..1..2....3..0..2..3..0..3

CROSSREFS

Sequence in context: A194490 A232379 A333136 * A231107 A231251 A051183

Adjacent sequences:  A231058 A231059 A231060 * A231062 A231063 A231064

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified July 9 16:50 EDT 2020. Contains 335545 sequences. (Running on oeis4.)