A104038 - OEIS

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A104038

Least k such that k*(k+1)*Mersenne-prime(n)+1 is prime.

1, 2, 3, 12, 8, 3, 5, 14, 17, 69, 189, 42, 392, 377, 12, 2007, 434, 744, 705, 1089, 1109, 7833 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	EXAMPLE	`12(2^2-1)+1=7 prime so k(1)=1` `23(2^3-1)+1=43 prime so k(2)=2` `34(2^5-1)+1=373 prime so k(3)=3`
	CROSSREFS	`Sequence in context: A124442 A088611 A137765 * A112979 A092972 A081526` `Adjacent sequences: A104035 A104036 A104037 * A104039 A104040 A104041`
	KEYWORD	`more,nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), Mar 31 2005`

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Last modified February 16 12:41 EST 2012. Contains 205909 sequences.