A233622 Number of (4+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards

274119232, 137370562281, 67296801927960, 32842430056859347, 16001415247695961563, 7793338521299515014276, 3795208453266491188651365, 1848139442487765531012150183, 899974040009917597170867049824

Offset

1,1

Comments

Row 4 of A233618

Links

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

Example

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

Crossrefs

Sequence in context: A122969 A137492 A105014 * A018881 A016930 A016990

Adjacent sequences: A233619 A233620 A233621 * A233623 A233624 A233625

Keyword

nonn

Author

R. H. Hardin, Dec 14 2013

Status

approved