711243

Appears in sequences

• Arises in combinatorial approach to the power of 2 in the number of involutions.at n=17A157253
• The number of flips to go from Hamiltonian cycle alpha_n to beta_n in the Cameron graph of size n using Thomason's algorithm.at n=8A332750
• a(n)^2 is the least square that, when written in base n, has exactly n digits n-1.at n=6A342260