A180462 a(n) is the smallest number m such that sigma(m)=34^n, or 0 if m does not exist.

1, 0, 0, 38659, 1333447, 45356239, 1542131167, 52432478719, 0, 44114690056791, 1545604624685757, 52550557239372861, 1542390446782691499, 52463299805385993363, 1783774217997898256739, 60648345436543315211523, 2091915317967934350057159, 69957029735592536691912261

Offset

0,4

Links

Max Alekseyev, Table of n, a(n) for n = 0..100

Example

a(3)=38659=67*577 since sigma(67*577)=(2^2*17)*(2*17^2)=2^3*17^3 and 38659 is the smallest such number.

Crossrefs

Cf. A048251, A110077, A180265, A180460, A180461, A180463, A180464.

Sequence in context: A074484 A186583 A043666 * A185851 A154062 A204759

Adjacent sequences: A180459 A180460 A180461 * A180463 A180464 A180465

Keyword

nonn

Author

Walter Kehowski, Sep 06 2010

Extensions

Terms a(16) onward from Max Alekseyev, Mar 04 2014

Status

approved