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A097544 Sum_{k=1..2n-1} J(4*n,k)*k^2, where J(i,j) is the Jacobi symbol. 2
1, -8, -24, 84, 24, -144, -224, 32, 654, -560, -616, 96, 312, -1120, -1440, 5456, -272, -288, -2888, 96, 1008, -4048, -3680, 576, 16700, -5200, -216, 896, 2088, -8160, -9920, 128, -1584, -12512, -10640, 41496, 4440, -12464, -16224, 2240, -2624, -18144, -21672, 2464, 864, -27232, -21056 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Suggested by a formula in Petersson.

REFERENCES

H. Petersson, Modulfunktionen und Quadratische Formen, Springer-Verlag, 1982; p. 98.

LINKS

Table of n, a(n) for n=1..47.

CROSSREFS

Cf. A097541-A097543.

Sequence in context: A180888 A296400 A297808 * A128688 A279162 A217016

Adjacent sequences:  A097541 A097542 A097543 * A097545 A097546 A097547

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Aug 27 2004

STATUS

approved

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Last modified September 22 17:41 EDT 2019. Contains 327311 sequences. (Running on oeis4.)