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A125167 Numbers n such that the n-th prime + n-th nonprime is itself prime. 0
1, 2, 3, 6, 7, 15, 20, 26, 29, 30, 35, 40, 42, 43, 46, 52, 57, 61, 65, 70, 75, 84, 92, 99, 100, 102, 105, 125, 139, 140, 144, 149, 154, 164, 171, 179, 183, 197, 202, 214, 218, 223, 227, 232, 234, 245, 247, 251, 258, 265, 272, 280, 288, 290, 294, 299, 304, 323, 325 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

The 15th prime is 47, while the 15th nonprime is 24. 47+24=71 which is itself prime. Similarly, the 30th prime is 113, while the 30th nonprime is 44. 113+44=157 which is prime.

CROSSREFS

Cf. A000040, A018252, A022797.

Sequence in context: A294524 A032882 A265394 * A137604 A034901 A275390

Adjacent sequences:  A125164 A125165 A125166 * A125168 A125169 A125170

KEYWORD

easy,nonn

AUTHOR

Jason G. Wurtzel, Nov 22 2006

EXTENSIONS

More terms from Klaus Brockhaus, Nov 23 2006

STATUS

approved

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Last modified January 22 17:33 EST 2019. Contains 319365 sequences. (Running on oeis4.)