A235260 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.

22500, 2691067, 417967682, 41170730836, 3998547995093, 282203684810984, 19728773908721866, 1090479569705332324, 59978597869556298802, 2740097672205395658455, 124802366974771368162608

Offset

1,1

Comments

Column 3 of A235261

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A204305 A251116 A235415 * A236085 A334532 A249614

Adjacent sequences: A235257 A235258 A235259 * A235261 A235262 A235263

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved