40619

Appears in sequences

• Number of permutations of length n which avoid the patterns 2314, 4321.at n=9A116708
• 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=11A289446