A233841 Number of (n+2)X(4+2) 0..3 arrays with no increasing sequence of length 3 horizontally or antidiagonally downwards.

23453646656, 55891166269184, 131619893152104448, 309991751661980537856, 729964339940515853733888, 1718914265875492989694529536, 4047676685721201279507422679040, 9531416229134972390161555327369216

Offset

1,1

Comments

Column 4 of A233845

Links

R. H. Hardin, Table of n, a(n) for n = 1..124

R. H. Hardin, Empirical recurrence of order 32

Formula

Empirical recurrence of order 32 (see link above)

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

Crossrefs

Sequence in context: A096630 A297005 A368034 * A338374 A015399 A129475

Adjacent sequences: A233838 A233839 A233840 * A233842 A233843 A233844

Keyword

nonn

Author

R. H. Hardin, Dec 16 2013

Status

approved