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A108568 a(n) = prime(n) + prime(n+1) - 2n - 1. 2
2, 3, 5, 9, 13, 17, 21, 25, 33, 39, 45, 53, 57, 61, 69, 79, 85, 91, 99, 103, 109, 117, 125, 137, 147, 151, 155, 159, 163, 179, 195, 203, 209, 219, 229, 235, 245, 253, 261, 271, 277, 287, 297, 301, 305, 317, 339, 353, 357, 361, 369, 375, 385, 399, 409, 419, 425 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..57.

PROG

(PARI) a(n) = prime(n) + prime(n+1) - 2*n - 1 \\ Michel Marcus, Jun 03 2013

CROSSREFS

Cf. A108562.

Sequence in context: A098142 A270812 A066821 * A221708 A256408 A256404

Adjacent sequences:  A108565 A108566 A108567 * A108569 A108570 A108571

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Jul 05 2005

EXTENSIONS

Extended by Ray Chandler, Jul 10 2005

STATUS

approved

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Last modified March 20 23:22 EDT 2019. Contains 321354 sequences. (Running on oeis4.)