A235543 Number of (n+1)X(3+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing rowwise and columnwise

141, 1049, 8711, 61401, 429443, 2704866, 16395328, 93093885, 508540185, 2659704703, 13471014030, 66144806353, 316636996887, 1480951215734, 6789622700273, 30573699358527, 135511534381407, 592152291952613

Offset

1,1

Comments

Column 3 of A235548

Links

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

R. H. Hardin, Empirical recurrence of order 77

Formula

Empirical recurrence of order 77 (see link above)

Example

Some solutions for n=4
..0..0..0..1....0..0..0..1....0..0..0..1....1..0..1..0....0..1..0..1
..0..1..0..0....0..0..0..0....0..0..0..1....0..0..1..1....0..0..1..1
..0..0..0..1....0..0..0..1....1..0..1..0....0..1..0..1....1..0..1..0
..1..0..1..0....1..0..0..1....0..0..1..1....1..1..0..1....1..1..0..1
..1..1..1..0....0..0..0..1....1..0..1..1....1..0..1..0....1..0..1..0

Crossrefs

Sequence in context: A186954 A235760 A201814 * A204469 A201553 A281560

Adjacent sequences: A235540 A235541 A235542 * A235544 A235545 A235546

Keyword

nonn

Author

R. H. Hardin, Jan 12 2014

Status

approved