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A141139
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a(n) = f(f(f(f(f(n))))), where f(n) is prime(n)-1.
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2
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1, 2, 150, 862, 4210, 6688, 12496, 15496, 24420, 40086, 43206, 67138, 83046, 88426, 102646, 133998, 161092, 169986, 202966, 235288, 243262, 279816, 305068, 346168, 394812, 438568, 454500, 481020, 498936, 521860, 633160, 670728, 715698, 741400
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OFFSET
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1,2
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LINKS
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MAPLE
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p:=ithprime: seq(p(p(p(p(p(n)-1)-1)-1)-1)-1, n=1..35); # Emeric Deutsch, Aug 06 2008
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MATHEMATICA
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Table[Prime[Prime[Prime[Prime[Prime[n - 1] - 1] - 1] - 1] - 1] - 1, {n, 2, 50}] (* Vincenzo Librandi, Apr 05 2015 *)
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PROG
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(PARI) vector(50, n, prime(prime(prime(prime(prime(n)-1)-1)-1)-1)-1) \\ Michel Marcus, Apr 09 2015
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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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