A250532 Number of (n+1) X (4+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

21326, 289035, 3091263, 28135982, 226449945, 1660642705, 11375090117, 73739279943, 459022341499, 2761125746280, 16191268966687, 92865194391622, 523878250294449, 2912236729173199, 16012243734396908, 87174468796623908, 471131292152987371, 2529294690019286231

Offset

1,1

Links

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

Example

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

Crossrefs

Column 4 of A250536.

Sequence in context: A254392 A253980 A349508 * A234454 A319017 A286635

Adjacent sequences: A250529 A250530 A250531 * A250533 A250534 A250535

Keyword

nonn

Author

R. H. Hardin, Nov 24 2014

Status

approved