A239979 - OEIS

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

1, 3, 13, 171, 7113, 652346, 226886115, 198719581101

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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 * A336204 A261361 A114317

Adjacent sequences: A239976 A239977 A239978 * A239980 A239981 A239982

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2014

STATUS

approved