A233803 Number of (2+2) X (n+2) 0..3 arrays with no increasing sequence of length 3 horizontally, vertically or antidiagonally downwards.

7959956, 1231134446, 192011782168, 29957246808751, 4668375990645847, 727613390704042525, 113382378138032185191, 17668628991719709583658, 2753265874450249736710283, 429037614663717954349428385

Offset

1,1

Comments

Row 2 of A233801.

Links

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

Example

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

Crossrefs

Cf. A233801.

Sequence in context: A360905 A233797 A203504 * A204970 A185929 A268334

Adjacent sequences: A233800 A233801 A233802 * A233804 A233805 A233806

Keyword

nonn

Author

R. H. Hardin, Dec 16 2013

Status

approved