id:A073259 - OEIS Search Results

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Length of FixedPointList leading to value of n-th composite number.

+0
6

4, 4, 4, 3, 3, 4, 4, 3, 3, 4, 4, 4, 3, 4, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 3, 4, 5, 4, 3, 4, 4, 4, 3, 3, 4, 4, 4, 3, 3, 4, 5, 4, 4, 3, 3, 4, 4, 4, 4, 5, 4, 4, 4, 3, 4, 4, 4, 5, 4, 4, 4, 3, 4, 4, 4, 4, 3, 3, 3, 4, 4, 4, 4, 5, 4, 4, 5, 5, 4, 4, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 5, 4, 4, 4, 3, 4, 5 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`See program below.`
	EXAMPLE	`n=1000000:the list={1000000,1078499,1084157,1084577,1084604,1084605}, its length including initial term is 6, while composite[1000000]=1084605.`
	MATHEMATICA	`Table[Length[FixedPointList[w+PrimePi[ # ]+1&, w]]-1, {w, 1, 128}]`
	CROSSREFS	`Cf. A064814, A002808, A073255-A073264.` `Sequence in context: A063448 A063570 A023977 this_sequence A071907 A074803 A046595` `Adjacent sequences: A073256 A073257 A073258 this_sequence A073260 A073261 A073262`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jul 22 2002`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

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