id:A145326 - OEIS Search Results

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Least k such that f(n,k) is not a prime, where f(n,1)=4n-1 and f(n,k)=f(f(n,k-1)) for k>=2.

+0
3

4, 2, 3, 1, 2, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 3, 1, 2, 3, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 3, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 2, 1, 1, 2, 3, 1, 1, 2, 1, 1, 2, 1, 1, 3, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`f(1,1)=3, f(1,2)=11, f(1,3)=43, f(1,4)=171, so a(1)=4.`
	CROSSREFS	`Cf. A145325, A145327.` `Sequence in context: A075418 A096870 A134977 this_sequence A016513 A063447 A018845` `Adjacent sequences: A145323 A145324 A145325 this_sequence A145327 A145328 A145329`
	KEYWORD	`easy,nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu), Oct 07 2008`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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