A129615 - OEIS

This site is supported by donations to The OEIS Foundation.

A129615

a(n) is the smallest natural number m such that 4^4^k + m is prime for k=0,1,...,n.

1, 1, 15, 385, 137593, 106908087 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	COMMENTS	`Next term is greater than 3*10^8.`
	EXAMPLE	`For k=0,1,...,5 4^4^k + 106908087 are prime and 106908087 is the smallest number with this property so a(5)=106908087.`
	CROSSREFS	`Cf. A129613, A129614.` `Sequence in context: A035274 A145409 A164323 * A069990 A157581 A143001` `Adjacent sequences: A129612 A129613 A129614 * A129616 A129617 A129618`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`Farideh Firoozbakht (mymontain(AT)yahoo.com), May 13 2007`

Content is available under The OEIS End-User License Agreement .

Last modified February 16 13:48 EST 2012. Contains 205921 sequences.