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A183896 Imaginary part of a (-4,-4) Gaussian integer Somos-4 sequence. 4
0, -1, -2, 0, 0, -128, -1024, 0, 0, -4194304, -134217728, 0, 0, -35184372088832, -4503599627370496, 0, 0, -75557863725914323419136, -38685626227668133590597632, 0, 0, -41538374868278621028243970633760768, -85070591730234615865843651857942052864, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Imaginary part of the Hankel transform of A183893(n)+I*A183894(n). A183895(n)+I*A183896(n) is a (-4,-4) Gaussian integer Somos-4

sequence.

LINKS

Table of n, a(n) for n=0..23.

FORMULA

a(n)=mod(C(n+1,2),2)*A183895(n).

CROSSREFS

Sequence in context: A326779 A293140 A008551 * A228073 A306936 A027652

Adjacent sequences:  A183893 A183894 A183895 * A183897 A183898 A183899

KEYWORD

sign

AUTHOR

Paul Barry, Jan 07 2011

STATUS

approved

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Last modified December 3 16:20 EST 2020. Contains 338906 sequences. (Running on oeis4.)