A240280 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4

2, 19, 80, 262, 1461, 5443, 24490, 117962, 459193, 2147788, 9481211, 39404594, 181740410, 780110007, 3374455576, 15188622683, 65126163196, 286616870440, 1266986470030, 5476212217332, 24183642014347, 105926526183355

Offset

1,1

Comments

Column 3 of A240284

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..3..3..1....3..1..3....3..3..1....3..1..3....3..3..1....3..3..1....3..1..3
..3..2..1....2..1..2....2..2..2....3..1..2....2..2..0....2..0..0....3..1..0
..3..1..2....2..1..1....2..1..2....2..1..1....2..1..2....2..0..1....2..1..2
..2..1..3....3..3..1....3..3..0....3..3..2....3..1..0....3..3..1....3..3..1

Crossrefs

Sequence in context: A226019 A057326 A129446 * A327820 A331898 A054570

Adjacent sequences: A240277 A240278 A240279 * A240281 A240282 A240283

Keyword

nonn

Author

R. H. Hardin, Apr 03 2014

Status

approved