A118328 Integer lengths of Catalan-primes: numbers n such that the concatenation of the first n decimal digits of Catalan's constant is prime.

52, 276, 25477

Offset: 1

Author

Eric W. Weisstein, Apr 24 2006

Keywords

• nonn
• more
• bref
• base

Examples

			C = 0.915965594177..., so a(1) = 52 (the 52-digit number 915965...6721 is the 1st prime in the digit string).
		

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

Crossrefs

Cf. A006752, A118329.

Extensions

a(3) = 25477 from Eric W. Weisstein, May 05 2006

Edited by Charles R Greathouse IV, Apr 27 2010