745920

Appears in sequences

• Number of unlabeled strength 3 Eulerian graphs with n nodes, 2 of odd degree.at n=5A007129
• A Chebyshev S-sequence with Diophantine property.at n=5A078364
• a(0) = 1, a(n) = 20*sigma[3](n).at n=33A091983
• The triangle T_2(n, m), where T_2(n, m) is the number of surjective multi-valued functions from {1, 1, 2, 3, ..., n-1} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).at n=43A172106
• The hyper-Wiener index of the linear phenylene with n hexagons.at n=14A224455
• E.g.f.: logarithm of G(x)/x where G(x) = x*exp(x) o x*exp(x^2) o x*exp(x^3) o x*exp(x^4) o ..., a composition of functions x*exp(x^n) for n = ...,3,2,1.at n=7A277183
• Sum of entries in the first cycles of all permutations of [n].at n=7A284816
• Sum T(n,k) of the entries in the k-th cycles of all permutations of [n]; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=28A285439
• Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*x^n/n! = Product_{j>0} ( exp(x^j/(1 - x^j)) )^u.at n=29A338864