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A204608 Number of (n+1)X(n+1) 0..1 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 1
16, 181, 4901, 313597, 45645661, 15468240213, 11909737623605, 21224284541503781, 86355017921168786869, 809181619551978590150053, 17365790350293711986891075413, 856356938035890178758703855462533 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204616

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A016909 A001455 A199018 * A279282 A231135 A230992

Adjacent sequences:  A204605 A204606 A204607 * A204609 A204610 A204611

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 17 2012

STATUS

approved

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Last modified October 24 20:35 EDT 2021. Contains 348233 sequences. (Running on oeis4.)