OFFSET
1,2
COMMENTS
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..90
FORMULA
a(n) = (ceiling(10^(n/2)) - 1)^2 - (ceiling(10^(n/3)) - 1)^3.
MATHEMATICA
Table[Abs[Floor[Sqrt[10^n-1]]^2-Floor[Surd[10^n-1, 3]]^3], {n, 30}] (* Harvey P. Dale, Apr 24 2022 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Zak Seidov, May 12 2006
EXTENSIONS
Corrected, extended, and definition clarified by Harvey P. Dale, Apr 24 2022
STATUS
approved