OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Greg Fee, Decimal Expansion of Catalan's Constant to 50000 digits.
Eric Weisstein's World of Mathematics, Catalan's Constant
MATHEMATICA
Select[FromDigits/@Partition[RealDigits[Catalan, 10, 800][[1]], 4, 1], PrimeQ[#]&&#>999&] (* Vincenzo Librandi, Apr 22 2013 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Andrew G. West (WestA(AT)wlu.edu), Mar 29 2005
EXTENSIONS
Changed offset from 0 to 1 by Vincenzo Librandi, Apr 22 2013
STATUS
approved