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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A288614 Primes of the form k!6+18, where k!6 is the sextuple factorial number (A085158). 1
 19, 23, 73, 109, 953, 1747, 21523, 1339993, 49579093, 894930593, 104463111043, 3879320022245629336393, 131181879631714694053764558690643, 5685668465320307573857236025777988251766371484393, 164577616892349380880997566903814398769391101461559752758998046893 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Price, Table of n, a(n) for n = 1..15 Henri& Renaud Lifchitz, PRP Records.Search for n!6+18. Joe McLean, Interesting Sources of Probable Primes OpenPFGW Project, Primality Tester MATHEMATICA MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 6] + 18, {i, 0, 100}], PrimeQ[#]&] Select[Table[(Times@@Range[k, 1, -6])+18, {k, 250}], PrimeQ] (* Harvey P. Dale, Dec 14 2021 *) CROSSREFS Cf. A288445. Sequence in context: A039292 A043115 A043895 * A033214 A107185 A240585 Adjacent sequences: A288611 A288612 A288613 * A288615 A288616 A288617 KEYWORD nonn AUTHOR Robert Price, Jun 11 2017 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.

Last modified September 16 23:59 EDT 2024. Contains 375984 sequences. (Running on oeis4.)