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A235961 Number of (n+1)X(7+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 1
7560, 176420, 3311312, 59037352, 997114552, 16500794898, 267591383236, 4292672074802, 68206975579218, 1077169051968340, 16927257076479028, 265101072902208072, 4140802701438271022, 64556448436549241648 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A235962

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A190108 A308913 A145313 * A235572 A206173 A205427

Adjacent sequences:  A235958 A235959 A235960 * A235962 A235963 A235964

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 17 2014

STATUS

approved

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Last modified July 31 22:03 EDT 2021. Contains 346377 sequences. (Running on oeis4.)