47900160
domain: N
Appears in sequences
- Denominators of coefficients for repeated integration.at n=9A002689
- Number of permutations of an n-set containing a 10-cycle.at n=12A029577
- E.g.f.: (1-2x-sqrt(1-4*x))*x^2/2.at n=9A052732
- E.g.f.: x^2*(1-sqrt(1-4*x))/2.at n=9A052733
- a(0) = a(1) = a(2) = 0; a(n) = n!/(n-2) for n > 2.at n=12A052747
- Denominator of expected length of longest increasing subsequence of a permutation of length n.at n=11A054677
- Denominators of nonzero numbers appearing in the Euler-Maclaurin summation formula. (See A060054 for the definition of these numbers.)at n=5A060055
- Product of the numbers k in the range 1 <= k <= n such that the proper divisors of k are a subset of the proper divisors of n.at n=11A158977
- Erroneous version of A002689.at n=9A169971
- Denominators in Taylor series expansion of Product_{n >= 1} (1+x^n/n!).at n=12A170909
- Write cos(x) = Product_{n>=1} (1 + g_n*x^(2*n)); a(n) = denominator(g_n).at n=5A170913
- a(n) = A091137(n+1)/(n+1).at n=9A174727
- Denominators of coefficients in expansion of x/(exp(x)-1).at n=10A227830
- a(n) = n!*A063019(n).at n=9A292751