2002220

Appears in sequences

• G.f.: A(x) = Product_{n>=1} 1/(1 - 4^n*x^n)^(4/4^n); self-convolution of A110156.at n=10A110154
• a(n) = Sum_{k=0..n} binomial(3*n-2*k+2,n-k).at n=8A390239