id:A073837 - OEIS Search Results

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Sum of primes p satisfying n <= p <= 2n.

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2, 5, 8, 12, 12, 18, 31, 24, 41, 60, 60, 72, 72, 59, 88, 119, 119, 102, 139, 120, 161, 204, 204, 228, 228, 228, 281, 281, 281, 311, 372, 341, 341, 408, 408, 479, 552, 515, 515, 594, 594, 636, 636, 593, 682, 682, 682, 635, 732, 732, 833, 936, 936, 990, 1099, 1099 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(7) = 31 = 7+11+13 (sum of primes between 7 and 14).`
	MAPLE	`for n from 1 to 150 do l := 0:for j from n to 2*n do if isprime(j) then l := l+j:fi:od:a[n] := l:od:seq(a[j], j=1..150);`
	PROGRAM	`(PARI) a(n)=sum(i=n, 2n, iisprime(i))`
	CROSSREFS	`Cf. A073838.` `Sequence in context: A135050 A004112 A024815 this_sequence A092767 A108311 A080753` `Adjacent sequences: A073834 A073835 A073836 this_sequence A073838 A073839 A073840`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 12 2002`
	EXTENSIONS	`More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de) and Benoit Cloitre, Aug 14 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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