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A138956 Primes of the form (4^n + 5^n)/9. 0
461, 10501, 2149818248341, 20728082811027490541, 481868222983777875077033646523111996342381, 63774650109719491827977851592475862662743267652837460857617262084586443004114519194264814815101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

MATHEMATICA

a={}; Do[p=(4^n+5^n)/9; If[PrimeQ[p], AppendTo[a, p]], {n, 1, 12^2}]; a

Select[Table[(4^n+5^n)/9, {n, 160}], PrimeQ] (* Harvey P. Dale, Oct 22 2011 *)

CROSSREFS

Cf. A128335.

Sequence in context: A227994 A142832 A277989 * A107121 A101734 A059025

Adjacent sequences:  A138953 A138954 A138955 * A138957 A138958 A138959

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, May 16 2008

STATUS

approved

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Last modified August 18 01:04 EDT 2019. Contains 326059 sequences. (Running on oeis4.)