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A253390 Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically 1
16, 102, 174, 346, 666, 1318, 2726, 5396, 11392, 22634, 47926, 95464, 201644, 402272, 846688, 1690724, 3546388, 7086130, 14818262, 29621624, 61778428, 123532896, 257035176, 514085752, 1067445536, 2135305688, 4425565336, 8853923848 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A253397

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..69

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A224155 A224406 A223016 * A264281 A240257 A199773

Adjacent sequences:  A253387 A253388 A253389 * A253391 A253392 A253393

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2014

STATUS

approved

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Last modified July 12 04:30 EDT 2020. Contains 335658 sequences. (Running on oeis4.)