A235739 Number of (n+1)X(3+1) 0..2 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.

3992, 160075, 6175786, 216691834, 7433913626, 244518790287, 7937748092921, 252930693591705, 8002365469207168, 251138131980679659, 7853962193148167112, 244782571628904782878, 7617125737044828266921, 236703159566273463901195

Offset

1,1

Comments

Column 3 of A235742

Links

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

Example

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

Crossrefs

Sequence in context: A236487 A235434 A200848 * A236079 A045262 A203088

Adjacent sequences: A235736 A235737 A235738 * A235740 A235741 A235742

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved