409836

Appears in sequences

• Coefficients of x^n in the n-th iteration of (x + x^2) for n>=1.at n=7A112317
• Table where row n lists the coefficients in the (2^n)-th iteration of x+x^2 for n>=0, read by antidiagonals not including trailing zeros in rows.at n=49A158264
• Triangle: T(n,k) equals the coefficient of x^n*y^k in the n-th iteration of x*(1+xy)/(1-x), for n>=1, 0<=k<n, as read by rows.at n=35A185755