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A297493
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a(n) = (1/2) * Sum_{|k|<=2*sqrt(p)} k^8*H(4*p-k^2) where H() is the Hurwitz class number and p is n-th prime.
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4
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129, 2444, 39714, 224664, 2214948, 5133114, 19734534, 34465980, 89757384, 286456170, 399954528, 969369474, 1620023118, 2055854724, 3207878544, 5850511794, 10003119540, 11817917898, 18893239884, 25249088088, 29012002734, 43064859120, 55130420604
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OFFSET
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1,1
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LINKS
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FORMULA
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Let b(n) = 14*n^5 - 28*n^3 - 20*n^2 - 7*n - 1.
a(n) = b(prime(n)).
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PROG
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(PARI) lista(nn) = forprime(p=2, nn, print1(14*p^5-28*p^3-20*p^2-7*p-1, ", ")); \\ Altug Alkan, Jan 01 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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