login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A234070 Number of (2+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally or diagonally downwards 1
11758836, 2080660489, 357463146593, 61295636223137, 10484411392439606, 1792961333867967659, 306554863282538650963, 52412780349441762503332, 8961050495323303553498002, 1532074589148145099758664619 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A234068

LINKS

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

EXAMPLE

Some solutions for n=1

..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

..0..2..0....0..0..1....0..0..1....0..3..0....1..2..1....0..3..3....2..0..1

..3..3..2....3..0..1....2..0..3....3..3..2....2..1..1....2..3..3....0..0..0

..3..1..3....0..1..1....0..3..2....3..2..3....0..0..2....1..2..2....3..0..3

CROSSREFS

Sequence in context: A141281 A028241 A248166 * A228978 A234831 A280983

Adjacent sequences:  A234067 A234068 A234069 * A234071 A234072 A234073

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 19 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 9 06:35 EST 2021. Contains 349627 sequences. (Running on oeis4.)