OFFSET
1,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..5000 (a(5000) corrected by Sean A. Irvine)
FORMULA
Equals Product_{k>=0} (1 + (-1)^k/(19*k + 18)). - Amiram Eldar, Aug 01 2020
MATHEMATICA
RealDigits[N[2^(1/19), 100]][[1]] (* Vincenzo Librandi, Apr 03 2013 *)
PROG
(PARI) sqrtn(2, 19) \\ Charles R Greathouse IV, Apr 15 2014
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved