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 A118328 Integer lengths of Catalan-primes: numbers n such that the concatenation of the first n decimal digits of Catalan's constant is prime. 2
 52, 276, 25477 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Eric Weisstein's World of Mathematics, Catalan's Constant Digits Eric Weisstein's World of Mathematics, Constant Primes Eric Weisstein's World of Mathematics, Integer Sequence Primes EXAMPLE C = 0.915965594177..., so a(1) = 52 (the 52-digit number 915965...6721 is the 1st prime in the digit string). CROSSREFS Cf. A006752, A118329. Sequence in context: A252335 A230533 A235654 * A079414 A270769 A281396 Adjacent sequences: A118325 A118326 A118327 * A118329 A118330 A118331 KEYWORD nonn,more,bref,base AUTHOR Eric W. Weisstein, Apr 24 2006 EXTENSIONS a(3) = 25477 from Eric W. Weisstein, May 05 2006 Edited by Charles R Greathouse IV, Apr 27 2010 STATUS approved

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Last modified December 5 15:27 EST 2022. Contains 358588 sequences. (Running on oeis4.)