A257428 Number of (3+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

10684, 30309, 117324, 450756, 1557227, 5347670, 18009368, 56974502, 175429523, 529347970, 1564618576, 4562215480, 13164718505, 37620437052, 106719838002, 300955191132, 844418347509, 2359570864166, 6571196297634, 18247737560110

Offset

1,1

Comments

Row 3 of A257426

Links

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

Example

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

Crossrefs

Cf. A257426

Sequence in context: A164565 A212075 A257421 * A254237 A207282 A207478

Adjacent sequences: A257425 A257426 A257427 * A257429 A257430 A257431

Keyword

nonn

Author

R. H. Hardin, Apr 22 2015

Status

approved