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!)
A228238 Primes of the form x^x * y^y + 1. 0

%I

%S 2,5,17,109,257,65537,3294173,145800001,210827009,13816758796289,

%T 167772160000000001,2844673747342852097,3874204890000000001,

%U 498062089990157893633,15191686954694985266495489,355271367880050092935562133789062501

%N Primes of the form x^x * y^y + 1.

%t nn = 40; Join[{2}, Select[Rest[Union[Flatten[Table[x^x*y^y + 1, {x, nn}, {y, x, nn}]]]], # <= nn^nn + 1 && PrimeQ[#] &]] (* _T. D. Noe_, Nov 04 2013 *)

%Y Cf. A000040, A156223.

%K nonn

%O 1,1

%A _Alex Ratushnyak_, Nov 02 2013

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 September 23 04:54 EDT 2020. Contains 337295 sequences. (Running on oeis4.)