A224209 Number of 7Xn 0..3 arrays with rows unimodal and antidiagonals nondecreasing

16384, 16000000, 1193130640, 27957232796, 357890479324, 3202561268692, 22835261226043, 140870217477853, 798868058955840, 4366075666967023, 23746055907139887, 130168228650264603, 715616641125345679

Offset

1,1

Comments

Row 7 of A224204

Links

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

R. H. Hardin, Empirical polynomial of degree 42

Formula

Empirical polynomial of degree 42 (see link above)

Example

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

Crossrefs

Sequence in context: A224396 A224029 A224286 * A017035 A326252 A269295

Adjacent sequences: A224206 A224207 A224208 * A224210 A224211 A224212

Keyword

nonn

Author

R. H. Hardin Apr 01 2013

Status

approved