43589145600
domain: N
Appears in sequences
- Order of alternating group A_n, or number of even permutations of n letters.at n=14A001710
- a(n) = (2n)!/2.at n=6A002674
- Denominator of 2*Stirling_2(n,2)/n!.at n=12A002679
- a(n) = n!*(n+6)! / 6!.at n=7A010795
- a(n) = n! *((-1)^n + 2*n + 3)/4.at n=13A052558
- Expansion of e.g.f. x/((1-x)(1-x^2)).at n=13A052591
- Expansion of e.g.f. (1-x^2)/(1-x^2-x^3).at n=13A052679
- a(n) = 7 * n!.at n=12A062098
- a(n) = n! / (number of distinct prime divisors of n).at n=12A062348
- a(n) = n! / (number of prime divisors of n, counted with multiplicity).at n=12A062349
- 2n! / number of divisors of n.at n=13A062833
- Surface area of n-dimensional sphere of radius r is n*V_n*r^(n-1) = n*Pi^(n/2)*r^(n-1)/(n/2)! = S_n*Pi^floor(n/2)*r^(n-1); sequence gives denominator of S_n.at n=30A072479
- Denominator of coefficients of power series for exp(exp(x)-1).at n=14A076904
- Triangle built from first column sequences of generalized Stirling2 arrays (m+2,2)-Stirling2, m >= 0.at n=38A091543
- Expansion of e.g.f. cos(i*log(1 + x)), i = sqrt(-1).at n=14A105752
- Number triangle T(n,k)=(2n)!/(2k)!.at n=29A119828
- Number of permutations of [n] with an even number of rises.at n=14A128103
- Numbers of the form (k!*(k+1))/2 with k or (k+1) prime.at n=10A177138
- Number of permutations of 1..n with the Sum_{i=1..n} of (i-p(i))^2 <= (n-1)*n*(n+1)/6.at n=14A180111
- Number of permutations of 1..n with the Sum_{i=1..n} of (i-p(i))^2 < (n-1)*n*(n+1)/6.at n=12A180112