

A063513


Least balanced numbers (A020492): m such that the quotient sigma(m)/phi(m) equals the nth prime.


0



3, 2, 56, 12, 2580, 630, 416640, 291060, 1719277560, 587133466920, 33044291280
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OFFSET

1,1


LINKS



FORMULA



EXAMPLE

n=7: p(7) = 17. a(7) = 416640 = 2^7*3*5*7*31. sigma(416640) = 1566720 = 17*phi(a(7)). phi(416640) = 92160.


CROSSREFS



KEYWORD

nonn,more


AUTHOR



EXTENSIONS



STATUS

approved



