A066089 Smallest m such that A066088(m) = A001221(A001157(m)) = n.
2, 3, 10, 12, 52, 188, 1175, 4840, 25168, 90992, 896368, 8164112, 30997008, 233151408, 2111839632
Offset: 1
Keywords
Examples
n = 5: a(5) = 52, sigma_2(52) = 2704+676+169+16+4+1 = 3570 = 2*3*5*7*17.
Programs
-
PARI
{ for (n=1, 100, m=1; while(omega(sigma(m, 2)) != n, m++); write("b066089.txt", n, " ", m) ) } \\ Harry J. Smith, Nov 12 2009
Extensions
Terms a(11) - a(13) from Harry J. Smith, Nov 12 2009
a(14)-a(15) from Donovan Johnson, Apr 16 2013