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A128473 Numbers of the form 30k+23 or numbers that cannot be part of a twin prime pair. 1
23, 53, 83, 113, 143, 173, 203, 233, 263, 293, 323, 353, 383, 413, 443, 473, 503, 533, 563, 593, 623, 653, 683, 713, 743, 773, 803, 833, 863, 893, 923, 953, 983, 1013, 1043, 1073, 1103, 1133, 1163, 1193, 1223, 1253, 1283, 1313, 1343, 1373, 1403, 1433, 1463 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

30k+23 -/+ 2 is a multiple of 3 or 5 precluding it from being part of a twin prime pair.

LINKS

Table of n, a(n) for n=1..49.

Counting Twin Primes

MATHEMATICA

Range[23, 7000, 30] (* Vladimir Joseph Stephan Orlovsky, Jul 13 2011 *)

PROG

(PARI) g(n) = forstep(x=23, n, 30, print1(x", "))

CROSSREFS

Sequence in context: A113912 A055782 A104802 * A132235 A277993 A051650

Adjacent sequences:  A128470 A128471 A128472 * A128474 A128475 A128476

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, May 06 2007

STATUS

approved

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Last modified June 27 14:58 EDT 2017. Contains 288790 sequences.