OFFSET
1,2
EXAMPLE
The positive integers which are coprime to 9 begin: 1,2,4,5,7,8,10,11,... Checking the partial products: 1=1, 1*2=2, 1*2*4 = 8, 1*2*4*5 =40,... 40 is the smallest such partial product which is >= 9. So a(9) = 40.
MATHEMATICA
a = {}; For[n = 1, n < 60, n++, p = 1; i = 1; While[p < n, i++; If[GCD[i, n] == 1, p = p*i]]; AppendTo[a, p]]; a (* Stefan Steinerberger, Feb 06 2008 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Dec 03 2007
EXTENSIONS
More terms from Stefan Steinerberger, Feb 06 2008
STATUS
approved