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.
The OEIS is supported by the many generous donors to the OEIS Foundation.


(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A234929 Primes which become cubes when the digits are rotated once to the left. 1

%I #13 Jan 04 2014 19:43:46

%S 251,3491,7219,10133,12979,20051,30491,54287,61757,205487,231443,

%T 300491,585737,714887,949303,1000133,1002979,1035791,1075357,1224809,

%U 2031443,2068147,3091267,3386989,5152087,5993837,6001757,6009733,6156089,6752953,7000219,7144289

%N Primes which become cubes when the digits are rotated once to the left.

%e The prime 7219 is in the list because 2197 = 13*13*13.

%o (PARI) rotl(a) = my(b,c,d); b=#Str(a); c=floor(a/(10^(b-1))); d=a-c*(10^(b-1)); 10*d+c

%o s=[]; forprime(n=2, 40000000, if(ispower(rotl(n),3), s=concat(s, n))); s

%o (Sage)

%o [i for i in primes_first_n(1000000) if Integer((int(str(i)[1:]+str(i)[:1]))).nth_root(3,True)[1]] # _Tom Edgar_, Jan 03 2014

%Y Cf. A234928.

%K nonn,base

%O 1,1

%A _Colin Barker_, Jan 01 2014

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 21 04:06 EDT 2024. Contains 372720 sequences. (Running on oeis4.)