A234392 Number of (n+2) X (4+2) 0..3 arrays with no increasing sequence of length 3 vertically, diagonally downwards or antidiagonally downwards.

32129615500, 57796098504371, 93663449566825996, 148995535070508548075, 233248382982183041074476, 363729711349034127664337880, 565789482757475561391507035318, 879461481826980839177382494847380, 1366494899233205512557562314440210006

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..10

Example

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

Crossrefs

Column 4 of A234393.

Sequence in context: A017387 A017507 A017639 * A212942 A233794 A202281

Adjacent sequences: A234389 A234390 A234391 * A234393 A234394 A234395

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Extensions

Name corrected by Andrew Howroyd, Mar 19 2025

Status

approved