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A161220 The n-th member of a twin prime pair minus 2*n. 0
1, 1, 1, 3, 3, 5, 5, 13, 13, 21, 21, 35, 35, 43, 43, 69, 69, 71, 71, 97, 97, 105, 105, 131, 131, 139, 139, 141, 141, 167, 167, 175, 175, 201, 201, 209, 209, 235, 235, 267, 267, 335, 335, 343, 343, 369, 369, 425, 425, 469, 469, 495, 495, 509, 509, 529, 529, 543 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

FORMULA

a(n)=A001097(n)-A005843(n).

EXAMPLE

a(1) = 3-2*1=1. a(2) =5-2*2=1. a(3)=7-2*3=1. a(4)=11-2*4=3.

CROSSREFS

Cf. A001097, A005843.

Sequence in context: A077980 A146245 A171710 * A032022 A147198 A147048

Adjacent sequences:  A161217 A161218 A161219 * A161221 A161222 A161223

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 06 2009

EXTENSIONS

Entries confirmed by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 23 2009

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Last modified February 14 18:09 EST 2012. Contains 205663 sequences.