A233796 Number of (n+2)X(1+2) 0..3 arrays with no increasing sequence of length 3 horizontally, vertically or antidiagonally downwards

169840, 7959956, 365649436, 16782644101, 768927679996, 35226902340272, 1613594778235212, 73911351482932388, 3385490494592260562, 155071415467618160481, 7102992268091179284628, 325350070820552469892019

Offset

1,1

Comments

Column 1 of A233801

Links

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

R. H. Hardin, Empirical recurrence of order 54

Formula

Empirical recurrence of order 54 (see link above)

Example

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

Crossrefs

Sequence in context: A236054 A233801 A233802 * A288356 A233791 A116890

Adjacent sequences: A233793 A233794 A233795 * A233797 A233798 A233799

Keyword

nonn

Author

R. H. Hardin, Dec 16 2013

Status

approved