A240149 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4

4, 8, 20, 67, 254, 825, 2667, 8652, 27929, 91436, 297311, 965014, 3135633, 10174603, 33030794, 107154304, 347714014, 1127972498, 3659419980, 11870924983, 38508782933, 124917347816, 405214920992, 1314447547691, 4263837727610

Offset

1,1

Comments

Column 3 of A240153

Links

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

Example

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

Crossrefs

Sequence in context: A060919 A009333 A187010 * A086912 A168451 A000585

Adjacent sequences: A240146 A240147 A240148 * A240150 A240151 A240152

Keyword

nonn

Author

R. H. Hardin, Apr 02 2014

Status

approved