63206

Appears in sequences

• Even numbers to the left of the central elements of the (1,2)-Pascal triangle A029635.at n=45A029647
• Even numbers to the right of the central numbers of the (2,1)-Pascal triangle A029653.at n=39A029661
• 1/512 of 11th unsigned column of triangle A053120 (T-Chebyshev, rising powers, zeros omitted).at n=8A054334
• Number of 4n X 4n alternating-sign matrices of type UU.at n=3A107445
• Number of positive clusters of type D_n.at n=9A129869
• Sum of root degrees of all symmetric ordered trees with n edges.at n=16A143360
• Number of ways to place 2 queens on an n X n chessboard so that they attack each other.at n=33A144945
• Number of faces of dimension n in a spherical triangulation of the manifold OP^2.at n=15A202292
• Coefficient array for powers of x^2 of the square of Chebyshev's C(2*n+1,x)/x =: tau(n,x) polynomials.at n=40A220669
• Stepped path in P(k,n) array of k-th partial sums of squares (A000290).at n=15A259775
• a(n) is the least positive integer k such that prime(n) + k divides the concatenation of prime(n) - 1 and prime(n).at n=42A385172