27525120

Appears in sequences

• E.g.f.: x^3*exp(x)^2.at n=16A052771
• Least number whose number of divisors is n-th term from A014613 (numbers of form p*q*r*s, products of exactly 4 primes, counted with multiplicity).at n=19A061218
• Index of first multiple of n-th prime in A005179.at n=19A161177
• Numerators of the BG1[ -5,n] coefficients of the BG1 matrix.at n=10A162443
• (1/2) times the sum of the elements of all subsets of [n] whose sum is divisible by two.at n=20A309294
• a(n) = denominator(b_n(x)), where b_n(x) are the polynomials defined in A335947.at n=19A335949
• Triangular array read by rows: T(n, k) is the number of ways that a k-element transitive tournament can occur as a subtournament of a larger tournament on n labeled vertices.at n=32A365638