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!)
A027309 a(n) = Sum_{k=0..n+1} T(n,k) * T(n,k+1), with T given by A026323. 0
2, 16, 123, 956, 7519, 59742, 478869, 3868104, 31458348, 257396972, 2117494621, 17504651148, 145341743066, 1211584784416, 10136488835157, 85085339305360, 716366098507550, 6048143934750432, 51194316337883625, 434360166677159652, 3693446859517381827 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

CROSSREFS

Sequence in context: A209361 A229808 A301947 * A241466 A069868 A208073

Adjacent sequences:  A027306 A027307 A027308 * A027310 A027311 A027312

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms and title corrected by Sean A. Irvine, Oct 27 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 August 4 06:38 EDT 2020. Contains 336201 sequences. (Running on oeis4.)