20044728

Appears in sequences

• Triangle of coefficients T(n,k) of y^k in Product_{k=0..n-1} (1 + (k+2)*y + y^2), read by rows of terms k = 0..2*n, for n >= 0.at n=90A324960
• a(n) is the coefficient of y^n in Product_{k=0..n-1} (1 + (k+2)*y + y^2), for n >= 0.at n=9A324961