72517

Appears in sequences

• Number of 5-ary rooted trees with n nodes and height at most 6.at n=16A036617
• Composite numbers n such that the distinct digits in n and the distinct digits in the proper divisors of n are the same.at n=33A237713
• Numbers k such that the set of all the decimal digits of k is the same as the set of all the decimal digits of the proper divisors of k.at n=34A282755
• Irregular triangle read by rows: T(n, k) is the number of chains of subspaces 0 < V_1 < ... < V_r = (F_2)^n, counted up to coordinate permutation, with dimension increments given by (any fixed permutation of) the parts of the k-th partition of n in Abramowitz-Stegun order.at n=62A348113
• G.f. satisfies A(x) = 1 - x*A(x)*(1 - 2*A(x)^3).at n=6A364430