A249563 - cp's OEIS frontend

A249563 Number of length n permutations avoiding (132,{2},{}) and (123,{},{1}).

n	a(n)
0	1
1	1
2	2
3	4
4	9
5	22
6	57
7	156
8	447
9	1335
10	4140
11	13290
12	44055
13	150494
14	528860
15	1909010
16	7068879
17	26820161
18	104156616
19	413634176
20	1678323602
21	6952182325
22	29378908664
23	126568357635
24	555540596435
25	2482857618713
26	11292588202568
27	52241502972732
28	245700673227652
29	1174263543570678
30	5700387781450739

[1, 1, 2, 4, 9, 22, 57, 156, 447, 1335, 4140, 13290, 44055, 150494, 528860, 1909010, 7068879, 26820161, 104156616, 413634176, 1678323602, 6952182325, 29378908664, 126568357635, 555540596435, 2482857618713, 11292588202568, 52241502972732, 245700673227652, 1174263543570678, 5700387781450739]

cp's OEIS Frontend

A249563 Number of length n permutations avoiding (132,{2},{}) and (123,{},{1}).

Table of values

List of values