A324138 - cp's OEIS frontend

A324138 Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 123 and t = 132.

n	a(n)
0	1
1	1
2	2
3	6
4	24
5	120
6	720
7	5020
8	39755
9	351518
10	3425572
11	36419844
12	419026188
13	5182797757
14	68535001302
15	964404124479
16	14383519018582
17	226579159065496
18	3758349089828472
19	65466833442028670
20	1194655878120996337
21	22788580047064423474
22	453513206778006345040

[1, 1, 2, 6, 24, 120, 720, 5020, 39755, 351518, 3425572, 36419844, 419026188, 5182797757, 68535001302, 964404124479, 14383519018582, 226579159065496, 3758349089828472, 65466833442028670, 1194655878120996337, 22788580047064423474, 453513206778006345040]

cp's OEIS Frontend

A324138 Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 123 and t = 132.

Table of values

List of values