OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..200
EXAMPLE
2697 is in the sequence because 2697^2 + 1 = 7273810 has five distinct divisors 2, 5, 41, 113, 157 and 157 + 2 = 5 + 41 + 113 = 159.
MATHEMATICA
Select[Range[1400000], Plus@@((pl=First/@FactorInteger[#^2+1])/2)==pl[[1]]+pl[[-1]]&](* program of Ray Chandler adapted for this sequence - see A199745 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Lagneau, Nov 12 2011
STATUS
approved