OFFSET
0,2
COMMENTS
Terms of this sequence are products of distinct terms in A005105. - Ray Chandler, Sep 01 2010
LINKS
Ray Chandler, Table of n, a(n) for n = 0..1000
PROG
(PARI) a(n) = {sn = 6^n; forstep(x=sn, 1, -1, if (sigma(x) == sn, return (x)); ); } \\ Michel Marcus, Dec 15 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(9)-a(14) from Donovan Johnson, Sep 02 2008
a(15)-a(20) from Donovan Johnson, Nov 22 2008
Edited and extended by Ray Chandler, Sep 01 2010
STATUS
approved