58278

Appears in sequences

• Form array in which n-th row is obtained by expanding (1+x+x^2)^n and taking the 2nd column from the center.at n=10A014531
• Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2} having k drops (n>=0, k>=0). The drops of a ternary word on {0,1,2} are the subwords 10,20 and 21.at n=48A120906
• The Wiener index of the nanostar dendrimer defined pictorially as NS_3 in the Ashrafi et al. references.at n=0A227496
• Subdiagonal partitions: number of partitions (p1, p2, p3, ...) of n with pi <= i.at n=47A238875
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type {A^H}_R terminating at point (n, m).at n=38A291080
• G.f.: Product_{n>=1} (1 - 2*x^n)^3.at n=47A322216
• a(n) = [x^n] Product_{k=0..n} 1/(1 - k*x)^3.at n=4A383862