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!)
A235720 Squares which have one or more occurrences of exactly five different digits. 3
12769, 13456, 13689, 13924, 15376, 15876, 16384, 17689, 17956, 18496, 18769, 20164, 20736, 21609, 21904, 23104, 23409, 23716, 28561, 29584, 30276, 30625, 30976, 31684, 32041, 32761, 34596, 35721, 36481, 37249, 38025, 38416, 39204, 39601, 41209, 43681, 45369 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The first term having a repeated digit is 100489.
LINKS
FORMULA
a(n) = A054033(n)^2.
EXAMPLE
30976 is in the sequence because 30976 = 176^2 and 30976 contains exactly five different digits: 0, 3, 6, 7 and 9.
PROG
(PARI) s=[]; for(n=1, 1200, if(#vecsort(eval(Vec(Str(n^2))), , 8)==5, s=concat(s, n^2))); s
CROSSREFS
Sequence in context: A207581 A207056 A210105 * A187600 A187597 A203273
KEYWORD
nonn,base
AUTHOR
Colin Barker, Jan 15 2014
STATUS
approved

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 June 19 23:45 EDT 2024. Contains 373510 sequences. (Running on oeis4.)