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A161542 m-th composite composite(m) is included iff composite(m) + m is prime. 0
4, 8, 9, 15, 20, 40, 44, 57, 63, 64, 66, 80, 81, 91, 94, 96, 114, 115, 121, 133, 136, 143, 146, 153, 154, 166, 174, 176, 177, 187, 190, 196, 200, 203, 207, 210, 225, 230, 252, 256, 268, 273, 275, 282, 302, 305, 318, 319, 322, 327, 330, 338, 341, 343, 344, 351 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

8 is composite (3) and 8+3 = 11 is prime; 9 is composite(4) and 9+4 =13 is prime

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

A002808

Sequence in context: A078177 A023886 A158337 * A131195 A020217 A141066

Adjacent sequences:  A161539 A161540 A161541 * A161543 A161544 A161545

KEYWORD

nonn

AUTHOR

Claudio Meller, Jun 13 2009

STATUS

approved

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Last modified May 26 17:17 EDT 2019. Contains 323597 sequences. (Running on oeis4.)