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A239642
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, modulo 4
0
2, 20, 1182, 320314, 471203608, 3608789598890, 144633234041629586, 30422021680410630610470, 33561342025910573963641656948
OFFSET
1,1
COMMENTS
Diagonal of A239649
EXAMPLE
Some solutions for n=3
..1..0..0....1..0..0....1..3..3....3..0..0....3..0..0....3..0..0....1..0..3
..1..3..1....2..1..0....2..3..2....2..1..1....2..0..3....2..3..3....1..0..0
..3..0..2....3..2..0....3..2..2....1..2..1....2..3..0....2..0..0....3..1..2
CROSSREFS
Sequence in context: A012790 A273194 A013144 * A369679 A112359 A308231
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 23 2014
STATUS
approved