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 A260229 a(n) = floor(e^(n!)). 0
 2, 7, 403, 26489122129, 13041808783936322797338790280986488113446079415755132 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The exponential growth in the number of permutations of n elements. Next term is too big to be included. LINKS FORMULA a(n) = A000149(A000142(n)). a(n) = floor(sqrt(e^A052849(n) - e^A000142(n) + sqrt(e^A052849(n) - e^A000142(n) + sqrt(e^A052849(n) - e^A000142(n) + ...)))). EXAMPLE a(1) = floor(e^(1!)) = floor(e) = 2. MATHEMATICA Table[Floor[E^n!], {n, 1, 7}] PROG (PARI) default(realprecision, 100); vector(5, n, floor(exp(n!))) \\ Michel Marcus, Aug 06 2015 CROSSREFS Cf. A000149, A000142. Cf. A050923, A100731. Sequence in context: A176748 A262088 A110386 * A321134 A027732 A073698 Adjacent sequences:  A260226 A260227 A260228 * A260230 A260231 A260232 KEYWORD nonn AUTHOR Ilya Gutkovskiy, Jul 20 2015 STATUS approved

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Last modified February 22 07:03 EST 2020. Contains 332118 sequences. (Running on oeis4.)