A129614 - OEIS

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A129614

a(n) is the smallest natural number m such that 3^(3^k) + m is prime for k=0,1,...,n.

2, 2, 4, 16, 346, 390410, 390410, 34712918410, 40501164004 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`Next term is greater than 2*10^8.`
	EXAMPLE	`For k=0,1,...,6 3^3^k + 390410 are prime and 390410 is the smallest number with this property so a(6)=390410.`
	CROSSREFS	`Cf. A129613, A129615.` `Sequence in context: A168089 A171163 A165420 * A070283 A070282 A051285` `Adjacent sequences: A129611 A129612 A129613 * A129615 A129616 A129617`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`Farideh Firoozbakht (mymontain(AT)yahoo.com), May 13 2007, Jun 01 2007`

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Last modified February 14 16:42 EST 2012. Contains 205635 sequences.