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 A255139 a(n) = n! - Fibonacci(n). 1
 1, 0, 1, 4, 21, 115, 712, 5027, 40299, 362846, 3628745, 39916711, 479001456, 6227020567, 87178290823, 1307674367390, 20922789887013, 355687428094403, 6402373705725416, 121645100408827819, 2432902008176633235, 51090942171709429054 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS FORMULA a(n) = A000142(n) - A000045(n). E.g.f.: 1/(1 - x) - 2*exp(x/2)*sinh(sqrt(5)*x/2)/sqrt(5). - Ilya Gutkovskiy, Dec 27 2016 EXAMPLE For n = 0, a(0) = 0! - F(0) = 1 - 0 = 1. MAPLE A255139 := proc(n) n!-combinat[fibonacci](n) ; end proc: # R. J. Mathar, Jul 08 2015 MATHEMATICA Table[n! - Fibonacci[n], {n, 0, 20}] PROG (PARI) vector(30, n, n--; n! - fibonacci(n)) \\ Michel Marcus, Jul 05 2015 CROSSREFS Cf. A000142, A000045, A080568 (the sum instead of the difference). Sequence in context: A190089 A349300 A240436 * A015554 A024051 A180908 Adjacent sequences: A255136 A255137 A255138 * A255140 A255141 A255142 KEYWORD nonn,easy AUTHOR Ilya Gutkovskiy, Jul 03 2015 STATUS approved

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Last modified November 30 04:37 EST 2022. Contains 358431 sequences. (Running on oeis4.)