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!)
A305734 Integers m such that m, m^2 and m^3 are all distinct-digit numbers. 0

%I #17 May 15 2022 18:40:30

%S 0,1,2,3,4,5,6,8,9,13,16,17,18,19,24,27,29,32,59,69,73,84,93,203,289,

%T 302

%N Integers m such that m, m^2 and m^3 are all distinct-digit numbers.

%C m must be <= 2154, since for m > 2154, m^3 has more than 10 digits and thus at least one digit in m^3 is repeated. - _Felix Fröhlich_, Jun 22 2018

%e {289, 289^2, 289^3} = {289, 83521, 24137569},

%e {302, 302^2, 302^3} = {302, 91204, 27543608}.

%t Select[Range[0,400],Max[DigitCount[#]]==Max[DigitCount[#^2]]== Max[ DigitCount[ #^3]] == 1&] (* _Harvey P. Dale_, May 15 2022 *)

%o (PARI) is(n) = vecsort(digits(n))==vecsort(digits(n), , 8) && vecsort(digits(n^2))==vecsort(digits(n^2), , 8) && vecsort(digits(n^3))==vecsort(digits(n^3), , 8) \\ _Felix Fröhlich_, Jun 22 2018

%Y Cf. A010784.

%K nonn,base,fini,full

%O 1,3

%A _Zak Seidov_, Jun 22 2018

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 April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)