1123200

Appears in sequences

• E.g.f. (1-x)^2/(1-4x+x^2).at n=6A052606
• Coefficients in expansion of Eisenstein series q*E'_4.at n=7A145094
• Triangle S(n,k) by rows: coefficients of 3^(n/2)*(x^(2/3)*d/dx)^n when n=0,2,4,6,...at n=24A223526
• Number of lattice paths from {2}^n to {0}^n using steps that decrement one component by 1 such that for each point (p_1,p_2,...,p_n) we have abs(p_{i}-p_{i+1}) <= 1 and abs(p_{1}-p_{n}) <= 1.at n=6A322782
• 3-parking triangle T(r, i, 3) read by rows: T(r, i, k) = (r + 1)^(i-1)*binomial(k*(r + 1) + r - i - 1, r - i) with k = 3 and 0 <= i <= r.at n=31A329059