login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A232467 Triangle read by rows: T(n,k) = number of fully connected (n,k) corner designs (n >= 0, 1 <= k <= n+1). 5
1, 2, 1, 6, 3, 2, 32, 21, 18, 9, 354, 257, 219, 159, 75, 8520, 6203, 5203, 4166, 2985, 1355 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

Craig S. Kaplan, Grid-based decorative corners, in Proceedings of Bridges 2013: Mathematics, Music, Art, ..., 2013, pp. 317-324.

Craig S. Kaplan, Illustrations of corner designs (some slides from Bridges 2013 talk - see above link for full article)

EXAMPLE

Triangle begins:

     1

     2    1

     6    3    2

    32   21   18    9

   354  257  219  159   75

  8520 6203 5203 4166 2985 1355

  ...

CROSSREFS

Cf. A232468, A232469, A232470, A232471.

Sequence in context: A094310 A165908 A121281 * A131449 A289869 A124443

Adjacent sequences:  A232464 A232465 A232466 * A232468 A232469 A232470

KEYWORD

nonn,tabl,nice,more

AUTHOR

N. J. A. Sloane, Nov 24 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 14 05:17 EST 2018. Contains 318090 sequences. (Running on oeis4.)