A152588 15^(2^n) + 2.

17, 227, 50627, 2562890627, 6568408355712890627, 43143988327398919500410556793212890627, 1861403728794734215467410604755702820123364205073812627233564853668212890627

Offset: 0

Author

Cino Hilliard, Dec 08 2008

Keywords

• nonn

Programs

PARI

g(a,n) = if(a%2,b=2,b=1);for(x=0,n,y=a^(2^x)+b;print1(y","))

Formula

a(n) = A175138(n+3)+2. - R. J. Mathar, Sep 10 2016