A153092 - OEIS

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A153092

Least k(n) such that k(n)*6^n*(6^n-1)+j is prime with j= -1 or 1 or both

1, 1, 1, 1, 3, 2, 3, 2, 20, 4, 5, 2, 9, 2, 27, 7, 12, 3, 3, 2, 3, 6, 6, 1, 18, 8, 2, 17, 2, 14, 55, 1, 18, 4, 59, 18, 30, 26, 32, 3, 14, 59, 42, 35, 40, 22, 7, 17, 26, 6, 28, 3, 15, 11, 6, 32, 30, 18, 14, 4, 85, 3, 1, 65, 13, 64, 7, 18, 40, 8, 68, 5, 5, 6, 107, 7, 88, 25, 6, 3, 1, 21, 8, 12, 9 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,5`
	COMMENTS	`When n increases sum k(n) for i=1 to n / sum n for i=1 to n tends to log(6)/4.5`
	LINKS	`Pierre CAMI, Table of n, a(n) for n = 1..1000`
	EXAMPLE	`16^1(6^1-1)-1=29 prime as 31 so k(1)=1`
	CROSSREFS	`A152414, A152090, A152091, A152093, A152094, A152095` `Sequence in context: A165258 A092962 A112924 * A165601 A054263 A178775` `Adjacent sequences: A153089 A153090 A153091 * A153093 A153094 A153095`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), Dec 18 2008`

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Last modified February 15 11:25 EST 2012. Contains 205777 sequences.