The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A038840 Cubes that are concatenations of primes. 3

%I #18 Mar 02 2021 16:32:30

%S 27,343,729,1331,2197,3375,4913,5832,19683,21952,24389,29791,35937,

%T 54872,59319,91125,103823,110592,117649,148877,166375,195112,205379,

%U 226981,250047,314432,357911,389017,421875,571787,614125,681472,753571,857375,941192,1092727

%N Cubes that are concatenations of primes.

%H Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a038/A038840.java">Java program</a> (github)

%e Examples from _Sean A. Irvine_, Feb 15 2021: (Start)

%e 3^3 = 27 = (2)(7).

%e 18^3 = 5832 = (5)(83)(2).

%e 29^3 = 24389 = (2)(43)(89).

%e (End)

%o (PARI) for(n=2,1e2,if(is_A152242(n^3),print1(n^3", "))) \\ _Charles R Greathouse IV_, Jun 10 2013

%Y Cf. A038692.

%K nonn,base

%O 1,1

%A _Jeff Burch_

%E Missing a(6), a(7), a(9), a(13), a(16)-a(18), a(21), a(23) from _Charles R Greathouse IV_, Jun 10 2013

%E Missing terms inserted and more terms from _Sean A. Irvine_, Feb 15 2021

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 28 16:19 EDT 2024. Contains 372916 sequences. (Running on oeis4.)