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!)
A173058 Leyland numbers (Cubes), a^b+b^a, a and b > 1. 0
8, 512, 1056589062271330492704679569833033213037694652072243044255921418053347805113449718948834511775314375789348789986514257357764695119005371074501077956925879153816773367998010168337463035352852882106048465816422376808296056585503123477676793797534072952979077161795475996672 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

2^3=8, 8^3=512,

101851798816724304313422284420468908052573419683296812531807022467719064988166\

8353091698688^3=1056...6672

MATHEMATICA

f[a_, b_]:=a^b+b^a; Select[Union[Flatten[Table[f[a, b], {a, 2, 150}, {b, 2, 150}]]], IntegerQ[(#1)^(1/3)]&]

CROSSREFS

Cf. A076980, A173054, A173055, A173056

Sequence in context: A035131 A067512 A067505 * A107672 A091112 A015480

Adjacent sequences:  A173055 A173056 A173057 * A173059 A173060 A173061

KEYWORD

nonn,bref

AUTHOR

Vladimir Joseph Stephan Orlovsky, Feb 08 2010

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 November 30 18:31 EST 2021. Contains 349424 sequences. (Running on oeis4.)