The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

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!)
 A161020 All the non-repdigit terms of A160818. 1
 370, 407, 481, 518, 592, 629, 370370, 407407, 481481, 518518, 592592, 629629, 370370370, 407407407, 456790123, 469135802, 481481481, 493827160, 506172839, 518518518, 530864197, 543209876, 592592592, 629629629, 370370370370 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All known terms are multiples of 111/3 = 37. Non-repdigit numbers n such that ((10^A055642(n)-1)/9)*(A007953(n)/A055642(n)) = n. So the sequence is infinite. - Altug Alkan, Sep 05 2016 LINKS EXAMPLE For example with 370: (073+037+307+370+703+730)/6 = 370. MAPLE read("transforms3") ; isrep := proc(n) if nops(convert(convert(n, base, 10), set)) = 1 then true; else false; fi; end: a160818 := BFILETOLIST("b160818.txt") ; for i from 1 to 400 do a := op(i, a160818) ; if not isrep(a) then printf("%d, ", a) ; fi; od: # R. J. Mathar, Jul 04 2009 CROSSREFS Cf. A160818, A275772, A275945. Sequence in context: A108772 A224562 A276413 * A102618 A225104 A234985 Adjacent sequences:  A161017 A161018 A161019 * A161021 A161022 A161023 KEYWORD base,nonn AUTHOR Johan Särnbratt, Jun 02 2009 EXTENSIONS More terms from R. J. Mathar, Jul 04 2009 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.

Last modified December 7 13:08 EST 2021. Contains 349581 sequences. (Running on oeis4.)