OFFSET
0,2
COMMENTS
Denominators are A128147.
FORMULA
a(n)=(-1)^C(n+1,2)*2^(C(2(n+1), 3)/4); a(n)=(-1)^C(n+1,2)*2^A000330(n);
MATHEMATICA
f[n_]:=2^n^2; lst={}; Do[a=f[n]; Do[a*=f[m], {m, n-1, 1, -1}]; AppendTo[lst, a], {n, 0, 13}]; lst(*Absolute Values!*) (* Vladimir Joseph Stephan Orlovsky, Feb 10 2010 *)
CROSSREFS
KEYWORD
easy,sign,frac
AUTHOR
Paul Barry, Feb 16 2007
EXTENSIONS
One more term from Sean A. Irvine, Sep 26 2011
STATUS
approved