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A138647 Primes of form (5^n+1)/6. 1
521, 11293772630057337854244300009061892827351888021, 6573840876841765045097738044023218580610053625908525039752324422200521, 164346021921044126127443451100580464515251340647713125993808110555013021 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

MATHEMATICA

a={}; Do[x=(5^n+1)/6; If[PrimeQ[x], AppendTo[a, x]], {n, 0, 12^2}]; a

Select[(5^Range[0, 200]+1)/6, PrimeQ] (* Harvey P. Dale, Jul 18 2011 *)

CROSSREFS

Sequence in context: A028484 A057699 A033525 * A045050 A305268 A004968

Adjacent sequences:  A138644 A138645 A138646 * A138648 A138649 A138650

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, May 15 2008

STATUS

approved

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Last modified November 28 19:48 EST 2021. Contains 349415 sequences. (Running on oeis4.)