A233802 Number of (1+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally, vertically or antidiagonally downwards

169840, 7949773, 371832256, 17394286865, 812933550972, 37996849382405, 1775753454824996, 82989727430563759, 3878460708033509128, 181257189415291707470, 8470916031355361999378, 395881857242187296966873

Offset

1,1

Comments

Row 1 of A233801

Links

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

R. H. Hardin, Empirical recurrence of order 60

Formula

Empirical recurrence of order 60 (see link above)

Example

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

Crossrefs

Sequence in context: A089203 A236054 A233801 * A233796 A288356 A233791

Adjacent sequences: A233799 A233800 A233801 * A233803 A233804 A233805

Keyword

nonn

Author

R. H. Hardin, Dec 16 2013

Status

approved