n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 14 |
5 | 46 |
6 | 132 |
7 | 444 |
8 | 1452 |
9 | 5164 |
10 | 18680 |
11 | 71080 |
12 | 278920 |
13 | 1135624 |
14 | 4774448 |
15 | 20692560 |
16 | 92381072 |
17 | 423566224 |
18 | 1994458656 |
19 | 9619233888 |
20 | 47516407008 |
21 | 239904464608 |
22 | 1237764055616 |
23 | 6515682543040 |
24 | 34984350444736 |
25 | 191360856810688 |
26 | 1065970229647232 |
27 | 6041353305197184 |
[1,1,2,6,14,46,132,444,1452,5164,18680,71080, 278920,1135624,4774448,20692560,92381072, 423566224,1994458656,9619233888,47516407008, 239904464608,1237764055616,6515682543040, 34984350444736,191360856810688,1065970229647232, 6041353305197184] |