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A074766 Prime(2n)-2prime(n)-n. 0
-2, -1, 0, 1, 2, 5, 2, 7, 6, 3, 6, 3, 6, 7, 4, 9, 4, 11, 10, 11, 14, 13, 10, 21, 10, 11, 18, 21, 24, 25, 8, 17, 10, 25, 16, 21, 22, 19, 24, 23, 22, 29, 18, 27, 24, 35, 22, 9, 18, 33, 40, 39, 42, 37, 32, 31, 24, 41, 34, 37, 46, 35, 24, 33, 42, 43, 28, 27, 24, 41, 44, 37, 32, 37, 30, 39, 32 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Conjecture: p(2n)-2p(n) < 2n for all n.

EXAMPLE

a(9)=p(18)-2p(9)-9=61-2*23-9=6.

CROSSREFS

A066066(n) - n.

Sequence in context: A103528 A138352 A129620 * A138107 A089631 A195982

Adjacent sequences:  A074763 A074764 A074765 * A074767 A074768 A074769

KEYWORD

sign

AUTHOR

Werner Sand (werner.sand(AT)tiscalimail.de), Sep 29 2002

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Last modified February 17 11:46 EST 2012. Contains 206011 sequences.