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 A248591 Numerators of the (simplified) rationals n*2^(n - 1)/(n - 1)! . 2
 1, 4, 6, 16, 10, 8, 28, 64, 2, 8, 44, 32, 52, 16, 8, 256, 34, 8, 76, 32, 4, 16, 184, 128, 4, 16, 8, 64, 232, 32, 496, 1024, 2, 8, 4, 32, 148, 16, 8, 128, 164, 16, 344, 64, 8, 32, 752, 512, 4, 16, 8, 64, 424, 32, 16, 256, 8, 32, 944, 128, 976, 64, 32, 4096, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS James Burling, Another Special Rational Sequence FORMULA a(n) = numerator(n*2^(n - 1)/(n - 1)!). a(n) = numerator(g(1, n)) where g(m, n) = m if m = n; 2*g(m + 1, n)/m otherwise. MATHEMATICA Table[Numerator[n 2^(n - 1)/(n - 1)!], {n, 1, 70}] (* Vincenzo Librandi, Oct 16 2014 PROG (PARI) vector(100, n, numerator(n*2^(n - 1)/(n - 1)!)) \\ Michel Marcus, Oct 09 2014 (MAGMA) [Numerator(n*2^(n-1)/Factorial(n-1)): n in [1..70]]; // Vincenzo Librandi, Oct 16 2014 CROSSREFS Cf. A248592 (denominators). Sequence in context: A239323 A009463 A066260 * A333140 A141042 A123667 Adjacent sequences:  A248588 A248589 A248590 * A248592 A248593 A248594 KEYWORD frac,nonn AUTHOR James Burling, Oct 09 2014 EXTENSIONS More terms from Michel Marcus, Oct 09 2014 STATUS approved

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Last modified August 11 20:13 EDT 2022. Contains 356067 sequences. (Running on oeis4.)