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!)
A195421 Smallest lower twin prime number which sums with its upper twin prime to a perfect n-th power. 0
3, 17, 3, 253124999, 4076863487, 578415690713087, 139967, 14097567309074239886172287, 73099303486215558911, 8954942912818222989311, 213770812332484473348458269897727733773465812991, 578415690713087, 66266428660760838427050496741110705203446361497484562431 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

FORMULA

a(n) = A195336(n)^n/2-1. - R. J. Mathar, Sep 20 2011

CROSSREFS

Cf. A001359

Sequence in context: A109216 A090478 A231785 * A140446 A124689 A093844

Adjacent sequences:  A195418 A195419 A195420 * A195422 A195423 A195424

KEYWORD

nonn

AUTHOR

Kausthub Gudipati, Sep 18 2011

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 May 7 02:20 EDT 2021. Contains 343636 sequences. (Running on oeis4.)