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A240419
Number of nX3 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4
1
15, 147, 1161, 7857, 52711, 347155, 2331517, 15537761, 105095051, 706172043, 4789433693, 32306879359, 219223146831, 1481437420511, 10050347301199, 67979587581455, 461025317180399, 3119972760414097, 21152593723563417
OFFSET
1,1
COMMENTS
Column 3 of A240422
FORMULA
Empirical recurrence of order 96 (see link above)
EXAMPLE
Some solutions for n=4
..0..0..1....0..3..0....0..1..1....0..1..0....0..0..0....0..0..3....1..1..3
..1..1..1....0..3..0....1..0..0....0..0..0....0..3..3....0..3..0....0..0..0
..1..1..2....1..1..3....0..1..1....1..1..3....1..0..0....0..3..3....0..0..0
..1..1..1....1..2..0....0..1..2....1..2..2....1..2..3....0..3..2....1..0..0
CROSSREFS
Sequence in context: A155638 A252982 A245755 * A069417 A051272 A021414
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 04 2014
STATUS
approved