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 A119334 Indices of Apery-primes: numbers n such that the concatenation of the first n decimal digits of Apery's constant zeta(3) is prime. 2
 10, 55, 109, 141 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS No additional terms up to 10000. - Harvey P. Dale, Aug 28 2019 LINKS Eric Weisstein's World of Mathematics, Apery-Prime Eric Weisstein's World of Mathematics, Integer Sequence Primes EXAMPLE zeta(3) = 1.2020569031595..., 1202056903--the concatenation of the first 10 decimal digits--is prime, so a(1)=10. MATHEMATICA Module[{nn=10000, z}, z=RealDigits[Zeta[3], 10, nn][[1]]; Select[Range[nn], PrimeQ[FromDigits[Take[z, #]]]&]] (* Harvey P. Dale, Aug 28 2019 *) CROSSREFS Cf. A002117, A119333. Sequence in context: A303608 A139610 A088404 * A321780 A074977 A069155 Adjacent sequences:  A119331 A119332 A119333 * A119335 A119336 A119337 KEYWORD nonn,more,base AUTHOR Eric W. Weisstein, May 14 2006 EXTENSIONS Edited by Charles R Greathouse IV, Apr 27 2010 STATUS approved

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Last modified May 15 10:54 EDT 2021. Contains 343909 sequences. (Running on oeis4.)