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 A110336 Smallest prime of the form 2n*(2n+2)*(2n+4)*...*(2n+2k) + 1 where k is a nonnegative integer. 1
 3, 5, 7, 13441, 11, 13, 929901772801, 17, 19, 7380172801, 23, 20530298881, 21841, 29, 31, 59535361, 7591472824321, 37, 63841, 41, 43, 32611799187695769164215700373287163408678912000001, 47 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(4) = 8*10*12*14 + 1 = 13441, 8 + 1, 8*10 + 1, 8*10*12 + 1 are all composite. MATHEMATICA Do[p = k = 2*n; While[ !PrimeQ[p+1], k += 2; p *= k]; Print[p+1], {n, 1, 30}] (* Ryan Propper, Aug 15 2005 *) CROSSREFS Sequence in context: A288212 A273010 A073691 * A073695 A268694 A068825 Adjacent sequences:  A110333 A110334 A110335 * A110337 A110338 A110339 KEYWORD nonn,more AUTHOR Amarnath Murthy, Jul 20 2005 EXTENSIONS More terms from Ryan Propper, Aug 15 2005 STATUS approved

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Last modified May 25 20:58 EDT 2020. Contains 334597 sequences. (Running on oeis4.)