638400

Appears in sequences

• a(n) = binomial(n+3,3)*binomial(n+7,3).at n=13A104474
• a(n) = 8*(6*n^2-37*n+60)*n^(n-7)*(2*n-7)!/(n-4)!.at n=3A134164
• Triangle: p(x) = (t/log(1 + t))^a0*(1 + t)^x; a0=2; weights (n+1)!*n!.at n=28A137381
• a(n) = sinh(2*arccosh(n))^2 = 4*n^2*(n^2 - 1).at n=20A173121
• Number of conjugacy classes of primitive elements in GF(11^n) which have trace 0.at n=7A192510
• Triangular array read by rows. T(n,k) is the number of functional digraphs on {1,2,...,n} such that no node is at a distance greater than one from a cycle and there are k recurrent elements whose preimage contains only one element, n>=0, 0<=k<=n.at n=40A220222
• Sequence A255412 sorted into ascending order, with duplicates removed.at n=33A254035
• a(n) = A000203(A255334(n)).at n=35A255412
• El Gradechi's hybrid coefficients alpha^{4,4}_{2n}.at n=9A331768