A371943 - cp's OEIS frontend

A371943 Number of permutations that end with a consecutive pattern 123, and avoid consecutive patterns 123 and 213 elsewhere.

n	a(n)
0	0
1	0
2	0
3	1
4	2
5	10
6	28
7	116
8	388
9	1588
10	5960
11	25168
12	102856
13	453608
14	1985008
15	9163360
16	42486128
17	205065136
18	1000056928
19	5035366208
20	25689681760
21	134588839648
22	715328668736
23	3889568161408
24	21463055829568
25	120839175460160
26	690344333849728
27	4015753752384256

[0, 0, 0, 1, 2, 10, 28, 116, 388, 1588, 5960, 25168, 102856, 453608, 1985008, 9163360, 42486128, 205065136, 1000056928, 5035366208, 25689681760, 134588839648, 715328668736, 3889568161408, 21463055829568, 120839175460160, 690344333849728, 4015753752384256]

cp's OEIS Frontend

A371943 Number of permutations that end with a consecutive pattern 123, and avoid consecutive patterns 123 and 213 elsewhere.

Table of values

List of values