This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A154526 Primes p such that lcm(1,2,3,...,p-2,p-1,p) -+ 1 are both primes. 2
 3, 5, 7, 19, 47 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Intersection of A154524 and A154525. LINKS PROG (PARI) isok(p) = {if (! isprime(p), return (0)); lcmv = lcm(vector(p, i, i)); isprime(lcmv + 1) && isprime(lcmv - 1); } \\ Michel Marcus, Oct 26 2013 CROSSREFS Cf. A056604, A154524, A154525. Sequence in context: A005850 A052334 A322302 * A126144 A171643 A072002 Adjacent sequences:  A154523 A154524 A154525 * A154527 A154528 A154529 KEYWORD more,nonn AUTHOR Lekraj Beedassy, Jan 11 2009 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.

Last modified December 14 01:22 EST 2019. Contains 329978 sequences. (Running on oeis4.)