106908

Appears in sequences

• Triangle, read by rows, T(n,k)=k/n*Sum_{i=0..n-k} C(2*n,n-k-i)*C(2*n+i-1,i).at n=30A257532
• Expansion of 1/sqrt(1 - 4*x - 8*x^3).at n=9A374598