OFFSET
1,1
COMMENTS
The first n of the form n = 6m-1 in this sequence is 86831.
What can be said about the asymptotic distribution of this set? If f(x) is the count of members not exceeding x, how does f behave as x tends to infinity?
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10000
Mathematics Stack Exchange, A number n which is the sum of all numbers k with sigma(k)=n?
PROG
(PARI) is_a(n)=sum(k=1, n, if(sigma(k)==n, k))>n
CROSSREFS
KEYWORD
nonn
AUTHOR
Jeppe Stig Nielsen, Jun 14 2015
STATUS
approved