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A239979 Number of n X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4 0
1, 3, 13, 171, 7113, 652346, 226886115, 198719581101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A239986

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..3..0..0..0....3..0..0..0....3..0..0..0....3..0..0..0....3..0..0..0

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

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

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

CROSSREFS

Sequence in context: A290758 A290769 A213794 * A261361 A114317 A168320

Adjacent sequences:  A239976 A239977 A239978 * A239980 A239981 A239982

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2014

STATUS

approved

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Last modified June 19 05:30 EDT 2019. Contains 324218 sequences. (Running on oeis4.)