121430

Appears in sequences

• Number of triangulations (by Euclidean triangles) having 3+3n vertices of a triangle with each side subdivided by n additional points.at n=6A087809
• Number of permutations of length n which avoid the patterns 321, 1342, 3124.at n=23A116718
• Total number of parts k in all partitions of n such that k does not divide n.at n=37A209313