54454

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.at n=9A149288
• Smallest natural number requiring n letters in Spanish.at n=45A161353
• Number of equivalence classes of convex lattice polygons of genus n, restricting the count to those polygons that are interior to another polygon.at n=35A322344
• a(n) = Sum_{k=1..n} binomial(2*k, k) * sigma_2(k).at n=5A356345