id:A118482 - OEIS Search Results

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Partial sums of Chen primes (starting with 1).

+0
1

1, 3, 6, 11, 18, 29, 42, 59, 78, 101, 130, 161, 198, 239, 286, 339, 398, 465, 536, 619, 708, 809, 916, 1025, 1138, 1265, 1396, 1533, 1672, 1821, 1978, 2145, 2324, 2505, 2696, 2893, 3092, 3303, 3530, 3763, 4002, 4253, 4510, 4773, 5042, 5323, 5616, 5923 (list; graph; listen)

	OFFSET	`0,2`
	MAPLE	`ischenprime:=proc(n); if (isprime(n) = 'true') then if (isprime(n+2) = 'true' or numtheory[bigomega](n+2) = 2) then RETURN('true') else RETURN('false') fi fi end: ts_partsum_chenprime:=proc(n) local i, ans, tren; ans:=1: tren:=1: for i from 1 to n do if (ischenprime(i)='true') then tren := tren+i: ans:=[op(ans), tren]: fi od; RETURN(ans) end: ts_partsum_chenprime(500);`
	CROSSREFS	`Cf. A014284, A109611.` `Sequence in context: A011849 A095944 A014284 this_sequence A026905 A066778 A123629` `Adjacent sequences: A118479 A118480 A118481 this_sequence A118483 A118484 A118485`
	KEYWORD	`nonn`
	AUTHOR	`Jani Melik (jani_melik(AT)hotmail.com), May 05 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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