A138956 - OEIS

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A138956

Primes of the form (4^n + 5^n)/9.

461, 10501, 2149818248341, 20728082811027490541, 481868222983777875077033646523111996342381, 63774650109719491827977851592475862662743267652837460857617262084586443004114519194264814815101 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	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] (* From Harvey P. Dale, Oct 22 2011 *)`
	CROSSREFS	`Cf. A128335.` `Sequence in context: A048923 A107973 A142832 * A107121 A101734 A059025` `Adjacent sequences: A138953 A138954 A138955 * A138957 A138958 A138959`
	KEYWORD	`nonn`
	AUTHOR	`Vladimir Orlovsky (4vladimir(AT)gmail.com), May 16 2008`

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Last modified February 13 16:05 EST 2012. Contains 205522 sequences.