-5664

Appears in sequences

• Riordan array (1-u, u) where u=(-1 + sqrt(1+8*x))/4.at n=30A110292
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A203001; by antidiagonals.at n=25A203002
• G.f. A(x) satisfies: A(x) = A(x^2 - x^3)/x.at n=27A273218