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A239398 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4 0
2, 23, 1337, 394509, 614216271, 5072216819342, 217822754771248124, 49235710631611399112515, 58260708510317695923927600575 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A239405

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A015211 A266992 A079480 * A239811 A082963 A083759

Adjacent sequences:  A239395 A239396 A239397 * A239399 A239400 A239401

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 17 2014

STATUS

approved

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Last modified July 14 08:33 EDT 2020. Contains 335720 sequences. (Running on oeis4.)