login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115267 Primes of the form p*q*r-2, where p, q and r are distinct primes. 3
103, 163, 193, 229, 271, 283, 383, 397, 433, 463, 593, 607, 613, 643, 661, 739, 757, 859, 883, 967, 1013, 1021, 1063, 1093, 1103, 1129, 1171, 1237, 1279, 1307, 1433, 1453, 1489, 1493, 1531, 1543, 1549, 1579, 1597, 1613, 1657, 1693, 1741, 1747, 1831 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

{A007304(n)-2} INTERSECTION {A000040}. - Jonathan Vos Post, Mar 06 2006

EXAMPLE

103 = 3*5*7-2, 163 = 3*5*11-2 etc.

MATHEMATICA

Select[Prime[Range[400]], Length[FactorInteger[ #+2]]==Plus@@(Last/@FactorInteger[ #+2])==3&]

CROSSREFS

Cf. A115093 Primes of the form p*q-2, where p and q are distinct primes.

Cf. A000040, A001359, A007304, A115093.

Sequence in context: A328822 A141962 A309412 * A107217 A142942 A142098

Adjacent sequences:  A115264 A115265 A115266 * A115268 A115269 A115270

KEYWORD

nonn

AUTHOR

Zak Seidov, Mar 04 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 19 19:44 EDT 2021. Contains 348091 sequences. (Running on oeis4.)