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A104089
Largest prime <= 4^n.
3
3, 13, 61, 251, 1021, 4093, 16381, 65521, 262139, 1048573, 4194301, 16777213, 67108859, 268435399, 1073741789, 4294967291, 17179869143, 68719476731, 274877906899, 1099511627689, 4398046511093, 17592186044399, 70368744177643
OFFSET
1,1
FORMULA
a(n) = A007917(A000302(n)). - Paolo Xausa, Oct 28 2024
MATHEMATICA
NextPrime[4^Range[30], -1] (* Paolo Xausa, Oct 28 2024 *)
PROG
(PARI) g(n, b) = for(x=0, n, print1(precprime(b^x)", "))
KEYWORD
easy,nonn,changed
AUTHOR
Cino Hilliard, Mar 03 2005
STATUS
approved