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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A062376 Numbers k such that Euler phi(k) / Carmichael lambda(k) = 8. 3
 80, 120, 160, 168, 195, 208, 255, 260, 264, 272, 280, 312, 320, 336, 340, 360, 390, 400, 408, 416, 420, 435, 440, 456, 464, 510, 528, 552, 555, 580, 592, 595, 600, 615, 616, 640, 656, 660, 663, 672, 696, 697, 715, 740, 744, 760, 765, 792, 795, 800, 820 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Solutions to A000010(n)/A002322(n)=8. LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 PROG (PARI) {cmf(f)=if( ((f[1]==2)&&(f[2]>2)), eulerphi(f[1]^f[2])/2, eulerphi(f[1]^f[2])) } {cl(f)= k=factor(f); l=1; for(x=1, omega(f), l=lcm(l, cmf([k[x, 1], k[x, 2]]))); l } {A062376(n)=eulerphi(n)/cl(n)} for(x=1, 1000, if(A062376(x)==8, print1(x, ", "))) CROSSREFS Cf. A000010, A002322, A034380, A033948, A033948, A062373-A062377. Sequence in context: A043223 A039400 A044003 * A223087 A261549 A068140 Adjacent sequences:  A062373 A062374 A062375 * A062377 A062378 A062379 KEYWORD easy,nonn AUTHOR Vladeta Jovovic, Jun 17 2001 EXTENSIONS More terms from Randall L. Rathbun, Jan 12 2002 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 January 22 22:56 EST 2021. Contains 340383 sequences. (Running on oeis4.)