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!)
 A309411 Numbers k such that (44^k + 1)/45 is prime. 0
 2, 7, 41233 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Larger terms correspond to probable primes. LINKS P. Bourdelais, A Generalized Repunit Conjecture MATHEMATICA Do[p=Prime[n]; If[PrimeQ[(44^p + 1)/45], Print[p]], {n, 1, 1000000}] PROG (PARI) is(n)=ispseudoprime((44^n+1)/45) CROSSREFS Sequence in context: A226704 A224420 A106023 * A215438 A152181 A153089 Adjacent sequences:  A309408 A309409 A309410 * A309412 A309413 A309414 KEYWORD nonn,bref,hard,more AUTHOR Paul Bourdelais, Jul 29 2019 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 16 09:06 EST 2019. Contains 330020 sequences. (Running on oeis4.)