196318

Appears in sequences

• Numbers n such that phi(n) = sigma(n) - sigma(n+1).at n=8A063943
• The number T(n) of isometries of all subspaces of the finite metric space {1,2,...,n} (as a subspace of the reals with the Euclidean metric).at n=15A183156
• Number of permutations p of [n] such that |p(i) - p(i-1)| is in {2,5} for all i from 2 to n.at n=30A307269