OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = ceiling(10^((n-1)/2)).
EXAMPLE
a(4) = 32, 32^2 = 1024 has 4 digits, while 31^2 = 961 has 3 digits.
MAPLE
A061436 := n->ceil(10^((n-1)/2));
MATHEMATICA
Table[Ceiling[Sqrt[10^n]], {n, 0, 30}] (* Harvey P. Dale, Jan 19 2012 *)
PROG
(Magma) [Ceiling(10^((n-1)/2)): n in [1..30]]; // Vincenzo Librandi, Oct 21 2011
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), May 16 2001
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003
STATUS
approved