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A250966 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements 1
14, 308, 22048, 5089900, 3794909318, 9135168475316, 71001116832347962, 1781714118279963697630, 144355770055582148091515150, 37761829882206405363232456330430, 31892938416369811765366547510541575588 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250973

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..14

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A251220 A205619 A034912 * A213466 A303488 A341501

Adjacent sequences:  A250963 A250964 A250965 * A250967 A250968 A250969

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified August 19 07:13 EDT 2022. Contains 356216 sequences. (Running on oeis4.)