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A096477
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Subscripts for "secondary twin-primes": numbers k such that prime(prime(k)+1) - prime(prime(k)) = A073124(k) = 2.
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6
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1, 2, 3, 4, 6, 7, 13, 14, 23, 24, 29, 30, 40, 59, 63, 65, 71, 74, 90, 103, 106, 110, 112, 117, 122, 128, 132, 187, 188, 193, 207, 248, 257, 258, 267, 271, 281, 285, 292, 296, 299, 300, 303, 304, 311, 317, 325, 340, 343, 344, 354, 356, 360, 368, 382, 389, 395, 402
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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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24 is a term since prime(prime(24)+1) - prime(prime(24)) = prime(89+1) - prime(89) = 463 - 461 = 2.
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MATHEMATICA
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Flatten[Position[Table[Prime[Prime[n]+1]-Prime[Prime[n]], {n, 1, 1000}], 2]]
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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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