60428

Appears in sequences

• Poincaré series [or Poincare series] P(T_{3,2}; x).at n=16A124615
• Number of edges in the Hasse diagram of the subgroup lattice of the symmetric group.at n=7A218927
• Number of permutations f of {1,...,n} with f(1) = 1 such that the n numbers prime(k) + prime(f(k)) + 1 (k = 1..n) are distinct primes.at n=16A390695