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

15, 392, 36016, 11633448, 13211127617, 52746349035592, 740399698245965774, 36539401198968631193728, 6339835499950780464168370698, 3867371786117427361119320198505328

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 * A366300 A323838 A278981

Adjacent sequences: A250947 A250948 A250949 * A250951 A250952 A250953

Keyword

nonn

Author

R. H. Hardin, Nov 28 2014

Status

approved