653837184000
domain: N
Appears in sequences
- Order of alternating group A_n, or number of even permutations of n letters.at n=15A001710
- Denominators in Taylor series for x * cosec(x).at n=6A036281
- E.g.f. (1-2x^2)/(1-x-2x^2).at n=12A052653
- a(n) = total number of occurrences of the consecutive pattern 1324 in all permutations of [n+3].at n=11A061206
- a(n) = n! / (number of distinct prime divisors of n).at n=13A062348
- a(n) = n! / (number of prime divisors of n, counted with multiplicity).at n=13A062349
- 2n! / number of divisors of n.at n=14A062833
- Order of the subgroup of the symmetric group S_n generated by the cycles (1,2,3) and (1,2,3,...,n).at n=12A070734
- Number of topological types of polygons with 2n different sides.at n=7A085990
- Table of graphs with n (>=0) nodes and k (>=0) edges. Each type of object labeled from its own label set.at n=39A091478
- Denominators of convergents to Magata's constant.at n=15A118204
- A091137(n) / A001316(n) .at n=12A165641
- A091137(n) / A001316(n) .at n=13A165641
- G.f.: Sum_{n>=0} (1 + n*x)^n * x^n / (1 + x + n*x^2)^n.at n=28A187741
- Row sums of 1-Euler triangle A188587.at n=14A188588
- Denominators of coefficients in expansion of exp(x)/(1 - x - x^2).at n=15A279335
- Irregular triangle read by rows: T(n,m) is the number of n X m (0,1)-matrices with pairwise distinct nonzero columns and pairwise distinct nonzero rows, n >= 0, m = 0..2^n-1.at n=28A318537
- Numbers k such that A008480(k) > k.at n=2A340155
- a(n) = denominator of (1/e) * Sum_{a_1>=1, a_2>=1, ... , a_n>=1} a_1 * a_2 * ... * a_n / (a_1 + a_2 + ... + a_n)!.at n=7A343831
- a(n) is the lowest common denominator of n-th Gilbreath polynomial.at n=17A347925