OFFSET
1,1
COMMENTS
a(13) > 10^13. - Giovanni Resta, Jul 13 2015
EXAMPLE
Number 7 is in sequence because sigma(7+3) - sigma(7) = 18 - 8 = 10 = 7 + 3.
PROG
(Magma) [n:n in[1..10^7] | SumOfDivisors(n+3)-SumOfDivisors(n) eq n+3]
(PARI)
for(n=1, 10^7, if(sigma(n+3)-sigma(n)==n+3, print1(n, ", "))) \\ Derek Orr, Sep 05 2014
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jaroslav Krizek, Sep 05 2014
EXTENSIONS
a(4)-a(8) from Hiroaki Yamanouchi, Sep 10 2014
a(9)-a(12) from Giovanni Resta, Jul 13 2015
STATUS
approved