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A077354
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a(n) = Sum_{i=n+1..2n} prime(i) - Sum_{i=1..n} prime(i).
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0
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1, 7, 21, 43, 73, 115, 165, 227, 301, 381, 471, 569, 685, 809, 937, 1089, 1247, 1425, 1611, 1809, 2023, 2249, 2479, 2735, 2997, 3267, 3553, 3859, 4181, 4513, 4835, 5191, 5547, 5937, 6335, 6745, 7171, 7607, 8059, 8523, 9005, 9507, 10007, 10527
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OFFSET
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1,2
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COMMENTS
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The analogous sequence for the natural numbers gives the squares.
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LINKS
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FORMULA
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a(n) = Sum_{i=1..n} (prime(n+i) - prime(i)), where prime(i) = A000040(i).
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PROG
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(PARI) s1=0:s2=0:for(n=1, 50, s1=s1+prime(n):s2=s2+prime(2*n)+prime(2*n-1):print1(s2-2*s1", "))
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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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