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A253332 Number of (7+1)X(n+1) 0..1 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw 1
3249, 9228, 25659, 74953, 210417, 600020, 1660088, 4590122, 12462900, 33364770, 88332846, 228094422, 584261303, 1450543774, 3577232487, 8532736844, 20234227845, 46437782630, 106028484423, 234761319957, 517489800375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A253326

LINKS

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

R. H. Hardin, Empirical recurrence of order 87

FORMULA

Empirical recurrence of order 87 (see link above)

EXAMPLE

Some solutions for n=4

..0..0..1..0..1....0..0..1..1..1....0..0..0..1..1....0..0..0..0..0

..1..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..1..0

..0..1..1..1..1....1..1..1..1..1....0..1..1..1..1....1..0..1..0..1

..1..0..0..0..0....0..0..0..0..0....1..0..0..0..0....1..0..1..0..1

..0..1..1..1..1....1..1..1..1..1....0..1..1..1..1....1..1..1..1..1

..1..1..0..1..0....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0

..0..1..1..1..1....1..1..1..1..1....1..1..1..1..1....1..1..1..1..1

..1..1..0..1..0....1..1..1..1..1....0..1..1..1..1....0..1..0..1..0

CROSSREFS

Sequence in context: A247725 A265198 A269061 * A253325 A204038 A235412

Adjacent sequences:  A253329 A253330 A253331 * A253333 A253334 A253335

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

STATUS

approved

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Last modified May 18 21:30 EDT 2022. Contains 353825 sequences. (Running on oeis4.)