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!)
A026967 a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026637. 0
1, 4, 24, 90, 365, 1376, 5272, 20098, 77016, 295836, 1139834, 4402490, 17042341, 66101848, 256838544, 999512058, 3895191476, 15199297796, 59377405654, 232208188726, 908978576496, 3561356276424, 13964734085774, 54799750800530, 215193550759630, 845596666261036 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..26.

CROSSREFS

Sequence in context: A097875 A212681 A026694 * A026977 A026952 A222670

Adjacent sequences:  A026964 A026965 A026966 * A026968 A026969 A026970

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from Sean A. Irvine, Oct 20 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 December 1 11:38 EST 2021. Contains 349429 sequences. (Running on oeis4.)