-9528

Appears in sequences

• Riordan array ((1-x^2)/(1+3x+x^2),x/(1+3x+x^2)).at n=39A110168
• Triangle read by rows: characteristic polynomials of certain matrices, see Mathematica program.at n=39A124040
• Triangle read by rows, T(n,k) = binomial(-k-n-1, -2*n-1)*E1(k+n, n), E1 the Eulerian numbers A173018, for n >= 0 and 0 <= k <= n.at n=13A321967