436304

Appears in sequences

• Coefficient of x^(3^n) in Q(x)^(n+1), where Q(x) = Sum_{k>=0} (x^(3^k) + x^(2*3^k)).at n=7A145073
• Number of compositions of 7*n into parts 6 and 7.at n=20A373912
• a(n) = Sum_{k=0..floor(n/2)} binomial(k+2,3*n-6*k+2).at n=42A390035