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A186196
a(n)=(-1)^n*(-2)^C(n,2)*A001045(n+1).
2
1, -1, -6, 40, 704, -21504, -1409024, 178257920, 45902462976, -23433341566976, -24030926136672256, 49179307930885816320, 201512232261203141853184, -1650485975228872480767606784, -27044038098228417485446267797504
OFFSET
0,3
COMMENTS
Hankel transform of A186195.
MATHEMATICA
f[k_] := (2^(k - 1)) (-1)^(k + 1)
t[n_] := Table[f[k], {k, 1, n}]
a[n_] := SymmetricPolynomial[n - 1, t[n]]
Table[a[n], {n, 1, 22}] (* A186196 signed *)
(* Clark Kimberling, Dec 30 2011 *)
CROSSREFS
Sequence in context: A374867 A196449 A281262 * A196478 A001367 A096671
KEYWORD
sign,easy
AUTHOR
Paul Barry, Feb 14 2011
STATUS
approved