1787607

Appears in sequences

• Central trinomial coefficients: largest coefficient of (1 + x + x^2)^n.at n=15A002426
• Number of symmetric, reduced unit interval schemes with n+1 intervals (n>=1).at n=30A005213
• a(n) = Sum_{k=0..n} binomial(2*k, k) * binomial(2*n+1, 2*k).at n=7A273055
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of sqrt(2 / ( (1-2*(k+4)*x+((k-4)*x)^2) * (1+(k-4)*x+sqrt(1-2*(k+4)*x+((k-4)*x)^2)) )).at n=43A337369