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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A027270 a(n) = Sum_{k=0..2n-3} T(n,k) * T(n,k+3), with T given by A026536. 0
10, 104, 420, 3786, 14826, 131264, 510576, 4508580, 17523506, 154773696, 602175444, 5323519838, 20744201142, 183586707648, 716553432640, 6348284151024, 24816637181076, 220081449149440, 861581808936200, 7647723960962932, 29978812970646870, 266322435212031984 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..24.

CROSSREFS

Sequence in context: A037687 A015588 A162667 * A227014 A036334 A190954

Adjacent sequences:  A027267 A027268 A027269 * A027271 A027272 A027273

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 26 2019

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 April 19 21:57 EDT 2021. Contains 343117 sequences. (Running on oeis4.)