45474

Appears in sequences

• Coefficient of x^7 in expansion of (1+x+x^2)^n.at n=10A005715
• a(n) = 4th elementary symmetric function of first n+3 positive integers congruent to 1 mod 3.at n=2A024214
• a(n) = T(2*n, n), T given by A027907.at n=7A027908
• T(n,[ n/2 ]), T given by A027907.at n=14A027913
• Number of length n binary words that have at least one maximal run of 1's having length two.at n=15A177795
• Number of 2n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) n.at n=15A244712
• G.f. is the cube of the g.f. of A006950.at n=20A273226
• Triangle read by rows: T(n, k) is the Sheffer triangle ((1 - 3*x)^(-1/3), (-1/3)*log(1 - 3*x)). A generalized Stirling1 triangle.at n=23A286718
• Column k=2 of the triangle A286718; Sheffer ((1 - 3*x)^(-1/3), (-1/3)*log(1 - 3*x)).at n=4A286721
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type {A^H}_R terminating at point (n, m).at n=56A291080