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A253376 Number of (2+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw 1
450, 3111, 22877, 148389, 945748, 5125790, 27587386, 130018165, 611215024, 2593349603, 10992085241, 43067682706, 168673810979, 621760259909, 2291824059768, 8059474696068, 28348577031630, 96115434260034 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A253375

LINKS

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

R. H. Hardin, Empirical recurrence of roder 79

FORMULA

Empirical recurrence of order 79 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Sequence in context: A253750 A253743 A253369 * A253150 A204224 A235438

Adjacent sequences:  A253373 A253374 A253375 * A253377 A253378 A253379

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

STATUS

approved

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Last modified June 18 10:54 EDT 2021. Contains 345098 sequences. (Running on oeis4.)