Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A128471
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A128471 Numbers of the form 30k+7 or with the exception of the first entry, numbers that cannot be part of a twin prime pair. +0
1
7, 37, 67, 97, 127, 157, 187, 217, 247, 277, 307, 337, 367, 397, 427, 457, 487, 517, 547, 577, 607, 637, 667, 697, 727, 757, 787, 817, 847, 877, 907, 937, 967, 997, 1027, 1057, 1087, 1117, 1147, 1177, 1207, 1237, 1267, 1297, 1327, 1357, 1387, 1417, 1447, 1477 (list; graph; listen)
OFFSET

1,1

COMMENT

30k+7 -/+ 2 is a multiple of 3 or 5. For k > 0 this, number is not prime.

LINKS

Counting Twin Primes

PROGRAM

(PARI) g(n) = forstep(x=7, n, 30, print1(x", "))

CROSSREFS

Adjacent sequences: A128468 A128469 A128470 this_sequence A128472 A128473 A128474

Sequence in context: A032588 A123084 A123085 this_sequence A132231 A104915 A089376

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard (hillcino368(AT)hotmail.com), May 06 2007

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.


AT&T Labs Research