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A120438 Average of twin-prime pairs modulo 10. 0
4, -4, 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; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

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

Second twin-prime average = 6 (= -4+1*10): a(2) = -4.

Third twin-prime average = 12 (=2+1*10): a(3) = +2.

CROSSREFS

Cf. A014574.

Sequence in context: A168455 A182781 A193556 * A192977 A038800 A126712

Adjacent sequences:  A120435 A120436 A120437 * A120439 A120440 A120441

KEYWORD

sign

AUTHOR

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

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.