A235419 Number of (n+1)X(3+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.

2304, 60879, 1607343, 33411901, 692896087, 11682620720, 200551110843, 2871917717259, 42041935330149, 525298071602797, 6697226820277449, 74334917602209111, 839152459304377096, 8384862572475130200

Offset

1,1

Comments

Column 3 of A235421

Links

R. H. Hardin, Table of n, a(n) for n = 1..151

Example

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

Crossrefs

Sequence in context: A218431 A187292 A235423 * A229698 A236280 A187194

Adjacent sequences: A235416 A235417 A235418 * A235420 A235421 A235422

Keyword

nonn

Author

R. H. Hardin, Jan 10 2014

Status

approved