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A231030 Number of nX7 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero 1
0, 10162, 2049324, 1740086452, 1050541512334, 688099769580280, 441589771066454894, 284877908767181431748, 183540635813549508209004, 118290502618097762855637884, 76230841327679401437205021568 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A231031

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A023066 A248487 A172810 * A323486 A153139 A243974

Adjacent sequences:  A231027 A231028 A231029 * A231031 A231032 A231033

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 03 2013

STATUS

approved

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Last modified May 12 10:54 EDT 2021. Contains 343821 sequences. (Running on oeis4.)