17643225600
domain: N
Appears in sequences
- Quadruple factorial numbers: a(n) = (2n)!/n!.at n=9A001813
- Expansion of e.g.f. sin(x^2) in powers of x^(4*n + 2).at n=4A024343
- Number of permutations p of {1,2,3...,n} that are fixed points under the operation of first reversing p, then taking the inverse.at n=35A037224
- Number of permutations p of {1,2,3...,n} that are fixed points under the operation of first reversing p, then taking the inverse.at n=36A037224
- Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,1].at n=45A048854
- a(n) = (n+9)!/9!.at n=9A049398
- a(n) = n! / floor(n/2)!.at n=18A081125
- Row 8 of array in A288580.at n=34A092973
- a(n) is n! times the coefficient of Pi^floor(n/2) in the volume of an n-dimensional unit ball.at n=18A094941
- Least product n*(n-1)*(n-2)*...*(n-k+1) divisible by (n-k)!.at n=17A096123
- Number of runs of length 1 in all permutations of [n]. (The permutation 3574162 has two runs of length 1: 357/4/16/2.)at n=12A097900
- Least number (n+1)(n+2)(n+3)...(n+k) >= n^n.at n=8A108135
- Number triangle (3n)!/(3k)!.at n=24A119831
- Bi-diagonal inverse of [k<=n]*n!/(2k)!.at n=54A119836
- If n mod 4 = 2 or n mod 4 = 3 then a(n) = 0 else let m=floor(n/4), then a(n) = (2*m)!/m!.at n=36A122670
- If n mod 4 = 2 or n mod 4 = 3 then a(n) = 0 else let m=floor(n/4), then a(n) = (2*m)!/m!.at n=37A122670
- a(n) = Product_{ceiling(n/2) <= k <= n, gcd(k,n)=1} k.at n=18A124442
- Sequence defined by a(2*n) = 2*(n^2 + 2*n) and a(2*n-1) = (2*n)!/n!.at n=17A154030
- a(n) = (6*n)!/(3*n)!.at n=3A166351
- a(n) = n!/ceiling(n/2)!.at n=18A205825