OFFSET
1,2
EXAMPLE
a(4) = floor(4321^(1/4)) = 8.
MATHEMATICA
Table[Floor[Surd[FromDigits[Flatten[IntegerDigits/@Range[n, 1, -1]]], n]], {n, 80}] (* Harvey P. Dale, Apr 21 2014 *)
PROG
(PARI) a(n) = {my(t=n); forstep(k=n-1, 1, -1, t=t*10^#Str(k)+k); sqrtnint(t, n); } \\ Jinyuan Wang, Mar 22 2020
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Jun 17 2004
EXTENSIONS
More terms from Harvey P. Dale, Apr 21 2014
STATUS
approved