login
A128146
Numerators of Hankel transform of 1/J(n+1), where J(n)=A001045(n).
1
1, -2, -32, 16384, 1073741824, -36028797018963968, -2475880078570760549798248448, 1393796574908163946345982392040522594123776, 25711008708143844408671393477458601640355247900524685364822016
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
Sequence in context: A342099 A091804 A012853 * A185995 A012604 A012731
KEYWORD
easy,sign,frac
AUTHOR
Paul Barry, Feb 16 2007
EXTENSIONS
One more term from Sean A. Irvine, Sep 26 2011
STATUS
approved