A240366 Number of 3Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4

7, 43, 257, 1693, 10997, 74255, 492758, 3349106, 22433886, 152643539, 1027272805, 6985683412, 47128486230, 320193692690, 2163219506254, 14685211888947, 99300200123859, 673693197611946, 4558092645337083, 30910190288935629

Offset

1,1

Comments

Row 3 of A240364

Links

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

R. H. Hardin, Empirical recurrence of order 80

Formula

Empirical recurrence of order 80 (see link above)

Example

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

Crossrefs

Sequence in context: A161728 A358682 A271197 * A329018 A003464 A022036

Adjacent sequences: A240363 A240364 A240365 * A240367 A240368 A240369

Keyword

nonn

Author

R. H. Hardin, Apr 04 2014

Status

approved