13426560

Appears in sequences

• Number of identity bracelets with n labeled beads of 3 colors.at n=7A032338
• a(n) = (4*n + 1)*n!.at n=9A082034
• A partition product of Stirling_1 type [parameter k = 5] with biggest-part statistic (triangle read by rows).at n=39A157395
• Triangular array read by rows. T(n,k) is the number of functions f:{1,2,...,n}->{1,2,...,n} that have exactly k recurrent elements whose preimage contains only one element, n>=0, 0<=k<=n.at n=50A220234
• Fourier coefficients of Eisenstein series of degree 2 and weight 4: a(n) = coefficient of the matrix [n, 0; 0, 1] with determinant n.at n=10A323991
• E.g.f. satisfies A(x) = 1 + x*A(x)*exp(x^3*A(x)).at n=9A365285