id:A064557 - OEIS Search Results

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a(n) = # { p | A064553(k) = p prime and k <= n}.

+0
4

0, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Primes occur in A064553 in natural order but less dense.`
	CROSSREFS	`A000720, A064553.` `Sequence in context: A090973 A076634 A083277 this_sequence A064601 A023967 A090532` `Adjacent sequences: A064554 A064555 A064556 this_sequence A064558 A064559 A064560`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Sep 21 2001`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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