3897234

Appears in sequences

• Third convolution of the powers of 3 (A000244).at n=10A027472
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*11^j.at n=22A038301
• Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*9^j.at n=26A038323
• Triangle read by rows: T(n,k) is number of hex trees with n edges and k leaves (n >= 1, 1 <= k <= 1 + floor(n/2)).at n=42A126177
• a(n) = floor(n*3^(n/2)).at n=21A128443