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A120439 Average of twin-prime pairs modulo 5. +0
1
-1, 1, 2, -2, 0, 2, 0, 2, 2, -2, -2, 0, 0, 2, -2, -2, 0, 0, 2, 2, -2, 0, 2, 2, 2, 0, 0, -2, 2, 0, 0, 2, -2, -2, 2, 0, 2, 0, 2, 2, 2, 0, -2, 0, 2, 0, -2, 2, 2, -2, -2, 0, -2, -2, 2, -2, 2, -2, 2, 0, -2, -2, 2, -2, 2, 0, 2, -2, -2, 0, 0, 2, 0, 2, -2, -2, 2, 0, 0, 2, 0, 0, 0, -2, 2, -2, 0, 0, 0, 2, 0, 2, -2, -2, 0, -2, 2, 2, -2, 2, 2, -2, 0, 2, 0, 0, 2, -2, -2, -2, 0 (list; graph; listen)
OFFSET

1,3

EXAMPLE

First twin-prime average = 4 (=-1+1*5): a(1) = -1.

Second twin-prime average = 6 (=1+1*5): a(2) = +1.

Third twin-prime average = 12 (=2+2*5): a(3) = +2.

CROSSREFS

Cf. A014574.

Sequence in context: A143787 A122157 A080378 this_sequence A104624 A049850 A050949

Adjacent sequences: A120436 A120437 A120438 this_sequence A120440 A120441 A120442

KEYWORD

sign

AUTHOR

Greg Huber (huber(AT)alum.mit.edu), Jul 18 2006

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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