A234397 Number of (4+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally or diagonally downwards

19562241288, 37540308719262, 74663552616253924, 148995535070508548075, 296950674399523467416905, 591678913274512252853315892, 1179012064704902472245619884737, 2349418800084350774932286320825865

Offset

1,1

Comments

Row 4 of A234393

Links

R. H. Hardin, Table of n, a(n) for n = 1..70

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..0..0....0..0..0....0..0..1....0..0..0....0..0..0....0..0..0....0..0..0
..1..0..1....3..0..3....0..0..0....2..1..0....3..2..1....3..3..3....2..3..0
..1..3..0....0..0..1....0..2..2....0..0..1....0..2..0....0..0..0....0..3..2
..2..3..0....0..2..2....2..0..0....2..3..1....1..0..3....1..3..2....3..3..0

Crossrefs

Sequence in context: A185932 A262533 A317288 * A234194 A118466 A003810

Adjacent sequences: A234394 A234395 A234396 * A234398 A234399 A234400

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Status

approved