333824

Appears in sequences

• Number of plane binary trees of size n+2 and height n.at n=13A073773
• E.g.f. exp(4x)/(1-4x).at n=5A097815
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 485", based on the 5-celled von Neumann neighborhood.at n=18A288595
• a(n) is the determinant of an n X n Hermitian Toeplitz matrix whose first row consists of 1, 2*i, ..., n*i, where i denotes the imaginary unit.at n=23A359559