28820

Appears in sequences

• Expansion of (1/2)*(1-sqrt(1-8*x)/sqrt(1-4*x)).at n=7A104498
• a(n) = number of solutions to the Diophantine equation x+y^2+z^3=n^4 with positive x,y,z.at n=22A121876
• Sum of all repeated parts of all partitions of n.at n=23A163986
• Number of ways to place 3 nonattacking wazirs on a 3 X n board.at n=19A172229
• Triangle read by rows: T(n,k) gives the number of ballot sequences of length n having k largest parts, n >= k >= 0.at n=67A238123
• Number of ballot sequences of length n having exactly 1 largest part.at n=11A238124
• A(n, k) is the n-th binomial transform of the Catalan sequence (A000108) evaluated at k. Array read by descending antidiagonals for n >= 0 and k >= 0.at n=59A271025
• Expansion of 2*x^2*(x+1) / (2*x^3-3*x+1).at n=11A293006
• Triangular array read by rows: T(m,n) = number of Yamanouchi words of length m that start with n, m >= 1, n = 1..m.at n=67A369588