87178291200
domain: N
Appears in sequences
- a(n) = n! if n is even, otherwise 0 (from Taylor series for cos x).at n=14A005359
- a(n) = (2n)!.at n=7A010050
- Stirling numbers of first kind S1(15,n).at n=0A011525
- exp(arcsinh(arctanh(x)))=1+x+1/2!*x^2+2/3!*x^3+5/4!*x^4+24/5!*x^5...at n=15A012254
- Order of shuffle group on n cards {0..n-1} generated by i->n-1-i and i->min{2i,2n-1-2i}.at n=13A014767
- Smallest factorial that begins with n.at n=7A018854
- a(n) = (2^n-2)!.at n=3A028367
- Product of consecutive factorials.at n=28A034882
- Factorials with initial digit '8'.at n=0A045519
- Denominators of Taylor series for sec(x). Also denominators of Taylor series for sech(x) = 1/cosh(x).at n=7A046977
- Denominators of coefficients in Taylor series for exp(cos(x)-1).at n=7A047690
- Triangle of number of permutations of {1, 2, ..., n} having exactly k cycles, each of which is of length >=r for r=4.at n=21A050212
- Triangle of number of permutations of {1, 2, ..., n} having exactly k cycles, each of which is of length >=r for r=5.at n=15A050213
- E.g.f. (1+x^3-x^4)/(1-x).at n=14A052565
- E.g.f. (2+x+x^2)/((1-x)(1+x+x^2)).at n=14A052579
- E.g.f. (1+x^4-x^5)/(1-x).at n=14A052596
- Expansion of e.g.f. x*(2+x)/(1-x^2).at n=14A052612
- E.g.f. x^3*(1+2x-2x^2)/(1-x).at n=14A052615
- E.g.f. (2+x+x^2+x^3)/(1-x^4).at n=14A052621
- E.g.f. (1+x^2-2x^3+x^4)/(1-x)^2.at n=13A052624