1,1
Table of n, a(n) for n=1..11.
a(n) = Min{x : A000203(x)/A000010(x) = p(n)} = Min{x : A023897(x) = p(n)}
n=7: p(7) = 17. a(7) = 416640 = 2^7*3*5*7*31. sigma(416640) = 1566720 = 17*phi(a(7)). phi(416640) = 92160.
Cf. A055234 (smallest x such that sigma(x) = n*phi(x)), A000203, A000010, A020492, A023897.
Sequence in context: A093892 A104254 A190286 * A016461 A069576 A109899
Adjacent sequences: A063510 A063511 A063512 * A063514 A063515 A063516
nonn
Labos E. (labos(AT)ana.sote.hu), Jul 31 2001
More terms from Robert G. Wilson v, Aug 09 2001
a(10)-a(11) (from A055234) added by Donovan Johnson, Feb 03 2012
approved
