153090

Appears in sequences

• Expansion of 1/(1-3*x)^5; 5-fold convolution of A000244 (powers of 3).at n=6A036217
• Invert transform applied twice to Pascal's triangle A007318.at n=40A055373
• Look at all numbers formed by multiplying the parts in a partition of n; a(n) = maximal such number which is divisible by n.at n=34A069188
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k vertices of outdegree 1 (n >= 0, k >= 0).at n=49A120981
• a(n) = (n^3 - n)*3^n.at n=5A128961
• Number of 3Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically.at n=8A207704
• Triangle read by rows: T(n,k) is the coefficient A_k in the transformation of 1 + x + x^2 + ... + x^n to the polynomial A_k*(x+k)^k for 0 <= k <= n.at n=48A248826
• Unitary weird numbers (A064114) that are divisible by 3.at n=2A326808
• Unitary weird numbers (A064114) that are not weird numbers (A006037).at n=13A328562