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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

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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

URL: https://oeis.org/A128131

⇱ A128131 - OEIS