A235415 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise

22500, 1826923, 149643266, 9676094946, 623604857055, 32662713888028, 1724073736174640, 76002795623829546, 3387480212316840735, 129022109042050899256, 4972470574066747942531, 166872014375969665991253

Offset

1,1

Comments

Column 3 of A235416

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Sequence in context: A250441 A204305 A251116 * A235260 A236085 A334532

Adjacent sequences: A235412 A235413 A235414 * A235416 A235417 A235418

Keyword

nonn

Author

R. H. Hardin, Jan 10 2014

Status

approved