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A073837
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Sum of primes p satisfying n <= p <= 2n.
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11
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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
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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a(7) = 31 = 7+11+13 (sum of primes between 7 and 14).
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MAPLE
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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);
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MATHEMATICA
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Table[Total[Select[Range[n, 2 n], PrimeQ]], {n, 56}] (* Jayanta Basu, Aug 12 2013 *)
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PROG
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(PARI) a(n)=sum(i=n, 2*n, i*isprime(i))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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