OFFSET
1,2
COMMENTS
EXAMPLE
a(4) = 14 is in the sequence because A239876(14) / 14 = 70 / 14 = 5 is an integer.
PROG
(Magma) [n: n in [1..1000] | u eq 0 where u is ((&+[(k*(k+1)div 2 - SumOfDivisors (k)) mod k: k in [1..n]]) mod n)]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 29 2014
EXTENSIONS
a(13)-a(25) from Giovanni Resta, Mar 29 2014
STATUS
approved