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!)
A047087 a(n) = A047080(2n,n+1). 3
1, 3, 8, 24, 75, 237, 755, 2421, 7804, 25264, 82081, 267487, 873970, 2862038, 9391137, 30869167, 101627704, 335049772, 1106003560, 3655124296, 12092095945, 40042017815, 132712302538, 440207294382, 1461259979347, 4853983051617, 16134233746913, 53660996850207 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..28.

CROSSREFS

Cf. A047080, A047085, A047086, A047088.

Sequence in context: A046342 A238977 A182453 * A000958 A148782 A148783

Adjacent sequences:  A047084 A047085 A047086 * A047088 A047089 A047090

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Corrected and extended by Sean A. Irvine, May 11 2021

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 January 27 22:40 EST 2022. Contains 350654 sequences. (Running on oeis4.)