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A261470
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a(n) = prime(n+3) - prime(n+2) - prime(n+1) + prime(n).
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3
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1, 2, 0, 0, 0, 0, 4, -2, 0, 2, -4, 0, 4, 2, -4, 0, 2, -4, 2, 2, 0, 4, -2, -6, 0, 0, 0, 12, 0, -8, -2, 4, 0, -4, 4, -2, 0, 2, -4, 4, 0, -6, 0, 8, 10, -8, -10, 0, 4, -2, 4, 4, -4, 0, -4, 0, 2, -4, 6, 12, -6, -12, 0, 12, 2, -4, -4, -6, 4, 4, 0, -2, -2, 0, 4, -2, 0
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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a(5) = 19 - 17 - 13 + 11 = 0.
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MATHEMATICA
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Table[Prime[i+3] - Prime[i+2] - Prime[i+1] + Prime[i], {i, 100}] (* G. C. Greubel, Aug 20 2015 *)
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PROG
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(PARI) first(m)=vector(m, i, prime(i+3)+prime(i)-prime(i+1)-prime(i+2)) \\ Anders Hellström, Aug 20 2015
(Haskell)
a261470 n = a261470_list !! (n-1)
a261470_list = zipWith (-) (drop 2 a001223_list) a001223_list
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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