OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
1068 is in the sequence because 1068^2 + 1 = 5^6 * 73.
390112 is in the sequence because 390112^2 + 1 = 5 * 13 * 17 ^ 6 * 97.
1999509 is in the sequence because 1999509^2 + 1 = 2 * 13 ^ 6 * 29 * 14281.
MATHEMATICA
Select[Range[2, 27000], Max[Transpose[FactorInteger[#^2+1]][[2]]]>5&]
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Lagneau, Nov 02 2012
STATUS
approved