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 A335233 Numbers m such that m!*i + 1 is composite for i = 1..m. 2
 50, 66, 67, 76, 81, 110, 117, 120, 122, 157, 178, 183, 217, 219, 226, 235, 240, 242, 244, 250, 254, 260, 266, 269, 274, 275, 287, 289, 309, 326, 346, 354, 363, 379, 380, 386, 400, 407, 410, 417, 419, 443, 449, 451, 470, 474, 489, 493, 509, 513, 518, 541, 543 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS If m is a term, then A321805(m) = 0. LINKS Chai Wah Wu, Table of n, a(n) for n = 1..240 MATHEMATICA Select[Range@ 200, (f = #!; NoneTrue[f*Range[#] + 1, PrimeQ]) &] (* Robert Price, Sep 14 2020 *) PROG (Python) from sympy import isprime A335233_list, f = [], 1 for k in range(1, 100):     f *= k     g = 1     for i in range(1, k+1):         g += f         if isprime(g):             break     else:         A335233_list.append(k) CROSSREFS Cf. A321805. Sequence in context: A007692 A025285 A092541 * A180103 A102803 A224559 Adjacent sequences:  A335230 A335231 A335232 * A335234 A335235 A335236 KEYWORD nonn AUTHOR Chai Wah Wu, Jun 09 2020 STATUS approved

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Last modified January 17 23:09 EST 2021. Contains 340249 sequences. (Running on oeis4.)