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A235445 Number of (n+1)X(4+1) 0..1 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise 1
742, 15936, 335898, 7017768, 146213244, 3043145826, 63315473350, 1317184566572, 27401048899854, 570010121664030, 11857587445735140, 246666181271526484, 5131244813184060086, 106742118037538403444, 2220490316595946662760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A235449

LINKS

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

R. H. Hardin, Empirical recurrence of order 53

FORMULA

Empirical recurrence of order 53 (see link above)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A252576 A188483 A235675 * A119595 A289141 A345547

Adjacent sequences:  A235442 A235443 A235444 * A235446 A235447 A235448

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)