216827928

Appears in sequences

• a(n) = Sum_{k=0..m} (k+1) * A026082(n, k), where 0 <= k <= m, m=n for n=0,1,2,3; m=2n for n >= 4.at n=16A027319
• Expansion of (-1+1/(1-3*x)^3)/(9*x).at n=14A036068