

A110597


Balanced numbers (A020492) = 1 mod 12.


0



1, 1045, 29029, 50065, 64285, 87685, 1390753, 2011009, 3189625, 7711405, 39298441, 53238625, 68393065, 75416341, 96345613, 225938245, 228404605, 231562825, 233591605, 279999445, 458406445, 462027565, 470527057, 491291125, 513574369, 663605761, 666373825
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

For the first 27 terms, the quotient sigma(n)/phi(n) is 1, 2 or 3.


LINKS

Table of n, a(n) for n=1..27.


MAPLE

with(numtheory); BNM1:=[]: for z from 1 to 1 do for m from 0 to 500000 do n:=12*m+1; if sigma(n) mod phi(n) = 0 then BNM1:=[op(BNM1), n] fi; od; od; BNM1;


PROG

(PARI) forstep(n=1, 1e5, 12, if(sigma(n)%eulerphi(n)==0, print1(n", "))) \\ Charles R Greathouse IV, Nov 27 2013


CROSSREFS

Cf. A000010, A000203, A020492, A062699.
Sequence in context: A224604 A045027 A023067 * A226114 A249653 A056092
Adjacent sequences: A110594 A110595 A110596 * A110598 A110599 A110600


KEYWORD

nonn


AUTHOR

Walter Kehowski, Sep 13 2005


EXTENSIONS

a(10)a(27) from Donovan Johnson, Aug 30 2012


STATUS

approved



