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 A289550 Primes of the form k!6-4, where k!6 is the sextuple factorial number (A085158). 1
 2, 3, 23, 401, 8501, 229631, 623641 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The next term is too large to display. The next term (a(8)) has 113 digits. - Harvey P. Dale, Dec 09 2020 LINKS Robert Price, Table of n, a(n) for n = 1..10 Henri & Renaud Lifchitz, PRP Records.Search for n!6-4. 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] - 4, {i, 4, 100}], PrimeQ[#]&] Select[Table[Times@@Range[n, 1, -6]-4, {n, 3, 100}], PrimeQ] (* Harvey P. Dale, Dec 09 2020 *) CROSSREFS Cf. A289547. Sequence in context: A064888 A104458 A191859 * A154553 A160341 A092388 Adjacent sequences:  A289547 A289548 A289549 * A289551 A289552 A289553 KEYWORD nonn AUTHOR Robert Price, Jul 07 2017 STATUS approved

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Last modified May 18 23:31 EDT 2022. Contains 353826 sequences. (Running on oeis4.)