login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A098422 Primes occurring in exactly two prime triples (p,q,r) with p<q<r=p+6. 3
7, 19, 41, 43, 101, 109, 193, 197, 227, 229, 311, 313, 461, 463, 823, 827, 857, 859, 881, 883, 1091, 1093, 1301, 1303, 1427, 1429, 1483, 1489, 1871, 1877, 1997, 1999, 2083, 2087, 2687, 2689, 3253, 3257, 3461, 3467, 4517, 4519, 4787, 4789, 5231, 5233, 5651 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A098418(a(n)) = 2; subsequence of A098420.

LINKS

Table of n, a(n) for n=1..47.

Eric Weisstein's World of Mathematics, Prime Triplet

MATHEMATICA

Select[Tally[Flatten[Select[Partition[Prime[Range[800]], 3, 1], #[[3]]- #[[1]] == 6&]]], #[[2]]==2&][[All, 1]] (* Harvey P. Dale, Jun 01 2019 *)

CROSSREFS

Cf. A098419, A098421, A098423.

Sequence in context: A295077 A239359 A120720 * A191066 A087762 A195349

Adjacent sequences:  A098419 A098420 A098421 * A098423 A098424 A098425

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 07 2004

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 17 23:07 EDT 2022. Contains 353779 sequences. (Running on oeis4.)