A128131 a(n) = 2^A000096(n)*A128130(n).

1, -4, 0, 0, -16384, 1048576, 0, 0, 17592186044416, -18014398509481984, 0, 0, -1237940039285380274899124224, 20282409603651670423947251286016, 0, 0, 5708990770823839524233143877797980545530986496

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Formula

a(n) = 2^n * 2^C(n+1,2) * A128130(n);

Maple

A128131 := proc(n)
    2^(n*(n+3)/2)*A128130(n) ;
end proc: # R. J. Mathar, Feb 24 2015

Crossrefs

Cf. A036442, A127945.

Sequence in context: A101453 A222399 A222519 * A321188 A322076 A115633

Adjacent sequences: A128128 A128129 A128130 * A128132 A128133 A128134

Keyword

easy,sign

Author

Paul Barry, Feb 15 2007

Extensions

Incorrect NAME removed. - R. J. Mathar, Feb 24 2015

Status

approved