368866

Appears in sequences

• a(n) is the number of permutations of length n that avoid the pattern 321 and the mesh pattern (12, 179) or the same sequence for the mesh patterns (12, 185), (12, 314), (12, 410).at n=13A289590
• Number of compositions of n with all adjacent parts (x, y) satisfying x > 2y or y > 2x.at n=35A342332