67856

Appears in sequences

• E.g.f. exp(tan(x)*log(1+x)).at n=8A009249
• Triangle of rooted planar maps, read by rows.at n=41A046652
• Triangle read by rows: T(n,k) is the number of nonseparable planar maps with 2*n+1 edges and a fixed outer face of 2*k edges which are invariant under a rotation of a 1/2 turn.at n=39A091665
• Lexicographically first sequence of distinct terms such that any set of four successive digits can be reordered as {d, d+1, d+2, d+3}, d being the smallest of the four digits.at n=50A302499