23781703680
domain: N
Appears in sequences
- Denominators of an asymptotic expansion for the number of forests on n nodes (A001858).at n=15A006573
- a(n) is the n-th quartic factorial number divided by 4.at n=8A034177
- E.g.f.: x/(1-4*x).at n=9A052570
- Triangle T(n,k) = C_n(k) where C_n(k) = number of k-colored labeled graphs with n nodes (n >= 1, 1<=k<=n).at n=32A058843
- Variant of A095236, where first two people choose payphones at the ends.at n=20A095240
- a(n) = n! * [x^n] 1/(1 - 4*x)^(n/4).at n=8A303487