A091712 - cp's OEIS frontend

A091712 a(n)=6(2n-4)!/((n-2)!n!), if n>2. a(0)=1,a(1)=a(2)=2.

n	a(n)
0	1
1	2
2	2
3	2
4	3
5	6
6	14
7	36
8	99
9	286
10	858
11	2652
12	8398
13	27132
14	89148
15	297160
16	1002915
17	3421710
18	11785890
19	40940460
20	143291610
21	504932340
22	1790214660
23	6382504440
24	22870640910
25	82334307276
26	297670187844
27	1080432533656
28	3935861372604

[1, 2, 2, 2, 3, 6, 14, 36, 99, 286, 858, 2652, 8398, 27132, 89148, 297160, 1002915, 3421710, 11785890, 40940460, 143291610, 504932340, 1790214660, 6382504440, 22870640910, 82334307276, 297670187844, 1080432533656, 3935861372604]

cp's OEIS Frontend

A091712 a(n)=6(2n-4)!/((n-2)!n!), if n>2. a(0)=1,a(1)=a(2)=2.

Table of values

List of values