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 A202422 Primes of the form n!*n!! + 1. 1
 2, 5, 19, 193, 1801, 56240459218944001, 112873711099106889552388221969528619131820978659655680000000000001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS For n > 4, the last digits of the prime numbers are of the form 01, 001, 0000000000001,...,...000001. Generated by n = 1, 2, 3, 4, 5, 14, 37, 48, 50, 52,... - R. J. Mathar, Dec 21 2011 LINKS EXAMPLE 19 is in the sequence because, for n = 3, 3!*3!! + 1 = 6*3 + 1 = 19. MATHEMATICA a={}; Do[p=n!*n!!+1; If[PrimeQ[p], AppendTo[a, p]], {n, 10^3}]; Print[a]; CROSSREFS Cf. A000142, A006882. Sequence in context: A108799 A193674 A085871 * A212269 A080280 A218386 Adjacent sequences:  A202419 A202420 A202421 * A202423 A202424 A202425 KEYWORD nonn AUTHOR Michel Lagneau, Dec 19 2011 STATUS approved

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Last modified May 26 22:22 EDT 2020. Contains 334634 sequences. (Running on oeis4.)