OFFSET
1,2
LINKS
Ivan Panchenko, Table of n, a(n) for n = 1..1000
MATHEMATICA
RealDigits[21^(1/5), 10, 120][[1]] (* Harvey P. Dale, Jun 21 2012 *)
PROG
(PARI) sqrtn(21, 5) \\ Charles R Greathouse IV, Apr 16 2014
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved