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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A102747 Primes p(n) such that p(n)#+p(n+1) is divisible by p(n+2). 0
2, 7, 103, 229561, 863833 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

7 belongs to this sequence since 2*3*5*7+11 is divisible by 13.

PROG

(PARI) { isgood(p) = local(r, p2, p3); p2=nextprime(p+1); p3=nextprime(p2+1); r=Mod(1, p3); forprime(q=1, p, r*=q); r+=p2; return(r==0); }

CROSSREFS

Cf. A002110, A058233.

Sequence in context: A192342 A102598 A206157 * A122524 A229165 A307329

Adjacent sequences:  A102744 A102745 A102746 * A102748 A102749 A102750

KEYWORD

hard,more,nonn

AUTHOR

Max Alekseyev, Feb 09 2005

EXTENSIONS

863833 from Ryan Propper, Jan 07 2008

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 November 17 18:24 EST 2019. Contains 329241 sequences. (Running on oeis4.)