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A193482 Number of n X n symmetric 0..3 arrays with each element equal to the product mod 4 of two of its horizontal and vertical neighbors 0
0, 2, 10, 212, 9201, 1236536, 391565294, 316110683652, 658828649763119, 3543427279193946969, 48701064645083867200925 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A320395 A001528 A293148 * A346222 A289948 A282567

Adjacent sequences:  A193479 A193480 A193481 * A193483 A193484 A193485

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 27 2011

STATUS

approved

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Last modified July 3 02:07 EDT 2022. Contains 355029 sequences. (Running on oeis4.)