The OEIS is supported by the many generous donors to the OEIS 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 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A122645 a(n) = phi(n)_phi(n) where phi() = A000010. 1
 1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 10, 4, 14, 6, 8, 8, 22, 6, 26, 8, 14, 10, 46, 8, 40, 14, 26, 14, 64, 8, 90, 22, 40, 22, 52, 14, 114, 26, 52, 22, 160, 14, 170, 40, 52, 46, 190, 22, 170, 40, 98, 52, 262, 26, 160, 52, 114, 64, 298, 22, 360, 90, 114, 98, 200, 40, 402, 98, 180, 52, 490 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS See A122618 for notation. LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A122618(A000010(n)). - Antti Karttunen, Dec 05 2017 MAPLE a:= n-> (b-> (l-> add(l[i]*b^(i-1), i=1..nops(l)))( convert(b, base, 10)))(numtheory[phi](n)): seq(a(n), n=1..80); # Alois P. Heinz, Jul 04 2022 PROG (PARI) A122618(n, d=digits(n)) = d*vectorv(#d, i, n^(#d-i)); \\ M. F. Hasler, Apr 22 2015 A122645(n) = A122618(eulerphi(n)); \\ Antti Karttunen, Dec 05 2017 CROSSREFS Cf. A000010, A122618. Sequence in context: A293484 A000010 A003978 * A122646 A028496 A063428 Adjacent sequences: A122642 A122643 A122644 * A122646 A122647 A122648 KEYWORD nonn,base,look AUTHOR N. J. A. Sloane, Sep 21 2006 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.

Last modified December 6 09:02 EST 2023. Contains 367600 sequences. (Running on oeis4.)