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A242652 Imaginary part of Prod_{k=0..n) (I-k). 4
1, -1, 1, 0, -10, 90, -730, 6160, -55900, 549900, -5864300, 67610400, -839594600, 11186357000, -159300557000, 2416003824000, -38894192662000, 662595375078000, -11911522255750000, 225382826562400000, -4477959179352100000, 93217812901913700000, -2029107997508660900000, 46099220630461596000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Shifted version of A009454. - R. J. Mathar, May 30 2014

REFERENCES

Edmund Landau, Handbuch der Lehre von der Verteilung der Primzahlen, Chelsea Publishing, NY 1953, pp. 561-562, Section 148.

LINKS

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

EXAMPLE

Table of n, Prod_{k=0..n) (I-k):

0, I

1, -1-I

2, 3+I

3, -10

4, 40-10*I

5, -190+90*I

6, 1050-730*I

7, -6620+6160*I

8, 46800-55900*I

9, -365300+549900*I

10, 3103100-5864300*I

11, -28269800+67610400*I

12, 271627200-839594600*I

CROSSREFS

Cf. A242651, A101686.

A231531 is the same except for signs.

Sequence in context: A038726 A009454 A231530 * A291392 A162756 A199940

Adjacent sequences:  A242649 A242650 A242651 * A242653 A242654 A242655

KEYWORD

sign

AUTHOR

N. J. A. Sloane, May 29 2014

STATUS

approved

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Last modified August 18 01:46 EDT 2019. Contains 326059 sequences. (Running on oeis4.)