A062375 Euler phi(n) / Carmichael lambda(n) = 6.

63, 91, 117, 126, 133, 171, 182, 189, 217, 234, 247, 259, 266, 279, 301, 333, 342, 351, 378, 387, 403, 427, 434, 441, 469, 494, 511, 518, 549, 553, 558, 559, 567, 589, 602, 603, 637, 657, 666, 679, 702, 711, 721, 763, 774, 806, 817, 837, 854, 871, 873, 882

Offset: 1

Author

Vladeta Jovovic, Jun 17 2001

Keywords

• easy
• nonn

Comments

Solutions to A000010(n)/A002322(n)=6.

Links

• R. J. Mathar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000010, A002322, A034380, A033948, A062373, A062374, A062376, A062377.

Programs

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 } {A062375(n)=eulerphi(n)/cl(n)} for(x=1,10001, if(A062375(x)==6,print1(x,",")))

Extensions

More terms from Randall L Rathbun, Jan 12 2002