144545

Appears in sequences

• Number of primitive (period n) bracelet structures using a maximum of six different colored beads.at n=12A056365
• a(n) is the number of permutations of length n that avoid the pattern 231 and the mesh pattern (21, 204) or the same sequence for the mesh patterns (21, 206), (21, 236), (21, 238).at n=12A289446