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A253378 Number of (4+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw 1
11100, 103572, 1027387, 10639450, 105139503, 943840336, 8129400162, 61350595327, 450711542396, 2911009846178, 18478731754431, 104649394080765, 585745828803677, 2972653381744884, 14960767110980305, 69280697059183435 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A253375

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..127

EXAMPLE

Some solutions for n=2

..1..0..1....2..0..1....0..1..0....2..0..1....0..1..0....0..0..1....1..0..1

..0..0..1....1..0..2....1..1..2....0..1..1....0..1..1....0..2..1....1..0..1

..0..2..0....2..0..1....1..1..0....1..1..2....1..2..0....0..2..0....0..1..0

..0..2..0....0..1..2....1..1..2....1..2..2....0..1..1....2..1..2....0..1..1

..2..1..2....2..1..0....2..1..2....2..2..2....1..2..2....1..1..1....1..1..1

CROSSREFS

Sequence in context: A211686 A224463 A300562 * A253371 A204226 A235440

Adjacent sequences:  A253375 A253376 A253377 * A253379 A253380 A253381

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

STATUS

approved

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Last modified October 20 04:37 EDT 2019. Contains 328247 sequences. (Running on oeis4.)