A235522 Number of (2+1)X(n+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise

2272, 61080, 1693053, 33809449, 677462696, 10650729023, 168095526255, 2189567171013, 28620629593255, 319485434417677, 3577241071949034, 35060741376690094, 344559923623341999, 3019877362280307030

Offset

1,1

Comments

Row 2 of A235521

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

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

Crossrefs

Sequence in context: A236606 A251493 A235519 * A235650 A059466 A260206

Adjacent sequences: A235519 A235520 A235521 * A235523 A235524 A235525

Keyword

nonn

Author

R. H. Hardin, Jan 11 2014

Status

approved