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A204413 Number of (n+2)X6 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way 1
2827014, 5597126, 5776350, 11785518, 89459577, 1122887052, 6016853259, 53009843553, 657496617930, 3488279987673, 30601214237808, 379380427569216, 2012724444183552, 17656894601957952, 218902435623346176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A204417

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 577*a(n-3) for n>15

EXAMPLE

Some solutions for n=3

..0..1..0..0..1..0....2..1..2..0..2..0....2..0..1..2..0..2....0..0..0..2..2..0

..1..0..0..1..0..0....1..2..2..1..0..0....0..0..0..1..2..2....0..2..1..0..1..1

..2..1..0..2..1..0....0..1..2..2..1..0....0..1..2..0..1..2....2..2..2..1..0..2

..2..2..1..2..2..1....0..0..1..2..2..1....1..0..1..2..2..0....0..1..2..2..1..1

..2..1..2..0..2..2....2..2..0..1..2..2....0..1..0..1..2..0....1..0..1..2..2..2

CROSSREFS

Sequence in context: A033534 A204744 A258563 * A204789 A204524 A321669

Adjacent sequences:  A204410 A204411 A204412 * A204414 A204415 A204416

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2012

STATUS

approved

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Last modified December 5 06:52 EST 2021. Contains 349543 sequences. (Running on oeis4.)