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A091277
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Numbers k such that the k-th prime is of the form m^2 + (m+1)^2.
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5
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3, 6, 13, 18, 30, 42, 65, 82, 112, 135, 170, 197, 212, 271, 284, 319, 353, 369, 445, 505, 612, 682, 933, 1069, 1193, 1226, 1286, 1510, 1609, 1676, 1711, 1789, 1900, 2161, 2241, 2285, 2363, 2450, 2667, 2712, 2924, 3247, 3644, 3894, 4000, 4100, 4367, 4647, 4922
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OFFSET
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1,1
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COMMENTS
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Also, the k-th prime is of the form (m^2+1)/2.
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LINKS
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FORMULA
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MATHEMATICA
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Select[Range[5000], OddQ[Sqrt[2Prime[#]-1]]&] (* Harvey P. Dale, Jun 25 2018 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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