login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A027142 a(n) = Sum_{k=0..2n-2} T(n,k) * T(n,k+2), with T given by A027113. 0
12, 105, 831, 6648, 53545, 434458, 3548871, 29166324, 241006333, 2001145585, 16688238416, 139711675493, 1173762075101, 9892582661593, 83617537623039, 708654873428000, 6020421349942965, 51261344063828713, 437370998284452284, 3738875265960650016 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..21.

CROSSREFS

Sequence in context: A051815 A004321 A016223 * A090816 A244722 A144133

Adjacent sequences:  A027139 A027140 A027141 * A027143 A027144 A027145

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 23 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 7 20:35 EDT 2022. Contains 355994 sequences. (Running on oeis4.)