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A250950 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element 1
15, 392, 36016, 11633448, 13211127617, 52746349035592, 740399698245965774, 36539401198968631193728, 6339835499950780464168370698, 3867371786117427361119320198505328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250956

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A069990 A157581 A143001 * A323838 A278981 A279133

Adjacent sequences:  A250947 A250948 A250949 * A250951 A250952 A250953

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2014

STATUS

approved

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Last modified April 18 14:46 EDT 2021. Contains 343089 sequences. (Running on oeis4.)