A258909 Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally and vertically.

3644672, 77704089, 2026873370, 55658584373, 1346660412346, 33594417416223, 843497063678720, 20397369281984560, 489343554187851696, 11717335464723341419, 277507963941823404580, 6517999553991196939304

Offset

1,1

Comments

Column 7 of A258910

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Cf. A258910

Sequence in context: A350335 A253992 A253999 * A090074 A114686 A217673

Adjacent sequences: A258906 A258907 A258908 * A258910 A258911 A258912

Keyword

nonn

Author

R. H. Hardin, Jun 14 2015

Status

approved