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 A289851 Primes of the form k!2-8, where k!2 is the double factorial number (A006882). 1
 7, 97, 937, 654729067, 13113070457687988603440617, 563862029680583509947946867, 536347102817482913555411512425352545980058003572241486357421867, 352999527454840466971061863960307904899505075341088595453568994140617 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Price, Table of n, a(n) for n = 1..10 Henri & Renaud Lifchitz, PRP Records.Search for n!2-8. 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, 2] - 8, {i, 5, 100}], PrimeQ[#]&] Select[Range[5, 100]!!-8, PrimeQ] (* Harvey P. Dale, Feb 06 2024 *) CROSSREFS Cf. A259359. Sequence in context: A116288 A219088 A116261 * A362472 A242377 A178005 Adjacent sequences: A289848 A289849 A289850 * A289852 A289853 A289854 KEYWORD nonn AUTHOR Robert Price, Jul 13 2017 EXTENSIONS Definition corrected by Harvey P. Dale, Feb 06 2024 STATUS approved

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Last modified June 22 14:17 EDT 2024. Contains 373587 sequences. (Running on oeis4.)