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A251220 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
14, 305, 20782, 4462968, 3007738372, 6373427948731, 42432102644410392, 887822645668106069016, 58374742677350528694024651, 12061621459257582136492647314788, 7831831916823870434473136772446378463 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251228

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A034834 A276699 A258491 * A205619 A034912 A250966

Adjacent sequences: A251217 A251218 A251219 * A251221 A251222 A251223

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified February 3 01:24 EST 2023. Contains 360024 sequences. (Running on oeis4.)