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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A329167 Numbers k such that k![4] - 32 is prime, where k![4] = A007662(k) = quadruple factorial. 0
 9, 11, 15, 25, 29, 47, 55, 67, 119, 171, 331, 475, 549, 819, 1151, 1543, 2303, 2749, 3303, 3649, 4065, 4261, 4497, 4873, 9105, 12749, 18677, 20121, 22459, 32489, 35765, 46971, 75843, 79585, 79731 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(36) > 10^5. The first 4 primes associated with this sequence are: 13, 199, 3433, 5221093. LINKS Table of n, a(n) for n=1..35. C. K. Caldwell, The Prime Glossary, multifactorial prime C. Caldwell and H. Dubner (Eds): The top ten prime numbers: from the unpublished collections of R. Ondrejka (May 2001), Table 21 F, p. 75. Ken Davis, Status of Search for Multifactorial Primes. Joe McLean, Interesting Sources of Probable Primes MATHEMATICA MultiFactorial[n_, k_] := If[n < 1, 1, n*MultiFactorial[n - k, k]]; Select[Range[1000], (x = MultiFactorial[#, 4] - 32; x > 0 && PrimeQ[x]) &] CROSSREFS Cf. A007662, A283553. Sequence in context: A163096 A027694 A063191 * A216976 A236390 A048464 Adjacent sequences: A329164 A329165 A329166 * A329168 A329169 A329170 KEYWORD nonn AUTHOR Robert Price, Nov 06 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 19 12:50 EDT 2024. Contains 376012 sequences. (Running on oeis4.)