OFFSET
1,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..5000
FORMULA
Equals Product_{k>=0} (1 + (-1)^k/(18*k + 17)). - Amiram Eldar, Aug 01 2020
MATHEMATICA
RealDigits[Power[2, (18)^-1], 10, 120][[1]] (* Harvey P. Dale, Jul 14 2011 *)
PROG
(PARI) sqrtn(2, 18) \\ Charles R Greathouse IV, Apr 15 2014
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved