OFFSET
1,3
EXAMPLE
Floor(sqrt(11)) = 3. So a(11) is the number of terms from among a(1),a(2),...a(10) which are coprime to 3. Terms a(1) through a(9) are each coprime to 3, so a(11) = 9.
MAPLE
a[1]:=1: for n from 2 to 100 do ct:=0: for j from 1 to n-1 do if igcd(a[j], floor(sqrt(n)))=1 then ct:=ct+1 else fi od: a[n]:=ct: od: seq(a[n], n=1..100); # Emeric Deutsch, Apr 16 2007
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Apr 12 2007
EXTENSIONS
More terms from Emeric Deutsch, Apr 16 2007
STATUS
approved