A254776 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2630, 11321, 50173, 207006, 876483, 3931849, 17766805, 80755741, 371133499, 1709570292, 7888129452, 36437414874, 168400742824, 778428650323, 3598875856069, 16639899151437, 76939511613102, 355761482032982

Offset

1,1

Comments

Row 2 of A254775

Links

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

R. H. Hardin, Empirical recurrence of order 75

Formula

Empirical recurrence of order 75 (see link above)

Example

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

Crossrefs

Sequence in context: A234698 A190936 A020439 * A254769 A254722 A236502

Adjacent sequences: A254773 A254774 A254775 * A254777 A254778 A254779

Keyword

nonn

Author

R. H. Hardin, Feb 07 2015

Status

approved