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A238805 Number of n X n 0..2 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it, modulo 3 0
2, 8, 48, 468, 7502, 197418, 8526852, 605163204, 70386525080, 13408775102044, 4179101921059146, 2129605103994689632 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A238812

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=5

..2..2..0..0..0....0..2..2..0..0....0..0..0..2..2....2..2..0..0..0

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

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

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

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

CROSSREFS

Sequence in context: A327904 A006925 A185135 * A005867 A280133 A192411

Adjacent sequences:  A238802 A238803 A238804 * A238806 A238807 A238808

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 05 2014

STATUS

approved

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Last modified May 21 00:36 EDT 2022. Contains 353886 sequences. (Running on oeis4.)