id:A020641 - OEIS Search Results

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A020641

a(n)-th prime is sum of first k primes for some k.

+0
2

1, 3, 7, 13, 45, 60, 977, 1108, 2470, 2687, 2784, 3126, 3470, 3977, 4100, 4511, 4644, 5668, 6148, 6627, 6963, 8407, 9767, 10379, 11007, 11220, 11449, 12111, 12332, 23080, 25001, 28009, 28357, 28709, 29060, 29404, 30824, 32271, 33397, 33764, 47735, 52278 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`PrimePi /@ Select[ FoldList[Plus, 0, Prime@ Range@450], PrimeQ@# &] (* Robert G. Wilson v Sep 28 2006 *)`
	CROSSREFS	`Cf. A013916, A013917, A013918.` `Sequence in context: A062605 A086208 A090968 this_sequence A062736 A103564 A083201` `Adjacent sequences: A020638 A020639 A020640 this_sequence A020642 A020643 A020644`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Renaud Lifchitz (100637.64(AT)CompuServe.COM), David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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