A218405 Numbers k for which sigma(k)/k - 3/4 is an integer.

4, 47616, 293760, 1782144, 3485664, 134209536, 282977280, 746444160, 1459956960, 1684126080, 1716728832, 27298252800, 41233360896, 376591138560, 719045268480, 1622308746240, 38965526046720, 41769966551040, 985261739212800, 3067660098994176

Offset

1,1

Comments

a(14) > 10^11. - Donovan Johnson, Oct 31 2012

a(16) > 10^12. - Giovanni Resta, Nov 04 2012

Links

Table of n, a(n) for n=1..20.

Crossrefs

Cf. A218404, A159907.

Sequence in context: A132638 A046882 A165812 * A259492 A074318 A276718

Adjacent sequences: A218402 A218403 A218404 * A218406 A218407 A218408

Keyword

nonn

Author

Zdenek Cervenka, Oct 28 2012

Extensions

a(6)-a(13) from Donovan Johnson, Oct 31 2012

a(14)-a(15) from Giovanni Resta, Nov 04 2012

More terms from Michel Marcus, Jun 26 2013

Status

approved