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A070748 signum(sin(prime(n))), where signum=A057427, prime=A000040. 7
1, 1, -1, 1, -1, 1, -1, 1, -1, -1, -1, -1, -1, -1, 1, 1, 1, -1, -1, 1, -1, -1, 1, 1, 1, 1, 1, 1, 1, -1, 1, -1, -1, 1, -1, 1, -1, -1, -1, -1, 1, -1, 1, -1, 1, -1, -1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

PROG

(PARI) a(n)=(-1)^(prime(n)/Pi%2\1) \\ Charles R Greathouse IV, Jun 13 2013

CROSSREFS

Cf. A070747, A070750, A070749, A070753, A070754.

Sequence in context: A186039 A057077 A262725 * A154990 A209615 A242179

Adjacent sequences:  A070745 A070746 A070747 * A070749 A070750 A070751

KEYWORD

sign

AUTHOR

Reinhard Zumkeller, May 04 2002

STATUS

approved

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Last modified August 20 22:45 EDT 2019. Contains 326155 sequences. (Running on oeis4.)