A063078 Numbers n such that phi(n)*mu(n) > phi(m)*mu(m) for all m < n.

1, 6, 10, 14, 15, 21, 33, 35, 51, 55, 65, 77, 85, 91, 115, 119, 133, 143, 161, 185, 187, 203, 209, 221, 247, 253, 287, 299, 319, 323, 341, 371, 377, 391, 403, 437, 451, 473, 481, 493, 517, 527, 551, 583, 589, 611, 629, 649, 667, 689, 697, 703, 713, 731, 767

Offset

1,2

Links

Harry J. Smith, Table of n, a(n) for n = 1..1000

Prog

(PARI) a=0; j=[]; for(n=1, 2000, b=eulerphi(n)*moebius(n); if(b>a, a=b; j=concat(j, n))); j
(PARI) { n=a=0; for (m=1, 10^9, b=eulerphi(m)*moebius(m); if(b>a, a=b; write("b063078.txt", n++, " ", m); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 17 2009

Crossrefs

Cf. A000010, A008683.

Sequence in context: A100660 A088709 A225706 * A064452 A085647 A072901

Adjacent sequences: A063075 A063076 A063077 * A063079 A063080 A063081

Keyword

easy,nonn

Author

Jason Earls, Aug 05 2001

Status

approved