login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A070195 Squarefree numbers in a pair of twin primes. 1
6, 30, 42, 102, 138, 282, 462, 570, 618, 642, 822, 858, 1230, 1290, 1302, 1482, 1698, 1722, 1878, 2082, 2130, 2238, 2310, 2382, 2658, 2730, 2802, 3390, 3462, 3558, 3918, 3930, 4002, 4218, 4242, 4422, 4638, 4722, 5010, 5442, 5478, 5502, 5658, 6090, 6198 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

n such that n is squarefree, n-1 and n+1 are primes.

PROG

(PARI) for(n=1, 8000, if(isprime(n)*issquarefree(n+1)*isprime(n+2)==1, print1(n+1, ", ")))

CROSSREFS

Sequence in context: A114649 A090126 A100194 * A110175 A014203 A044083

Adjacent sequences:  A070192 A070193 A070194 * A070196 A070197 A070198

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre and Elemer Labos (benoit7848c(AT)orange.fr), May 06 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 17:51 EST 2012. Contains 205651 sequences.