OFFSET
1,1
COMMENTS
Numbers k such that A217435(k+1) = 2.
a(14) >= 235, see FactorDB link.
LINKS
FactorDB, Status of 235^235+236^236.
Walter Nissen, Addendum to Prime factors of n^n + (n+1)^(n+1), Table F, 2014-01-07.
EXAMPLE
a(1) = 5 because 5^5 + 6^6 = 49781 = 67*743.
PROG
(PARI) for(k=0, 40, if(bigomega(k^k+(k+1)^(k+1))==2, print1(k, ", ")))
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Hugo Pfoertner, Aug 15 2019
STATUS
approved