n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 15 |
4 | 60 |
5 | 262 |
6 | 1243 |
7 | 6358 |
8 | 34835 |
9 | 203307 |
10 | 1257913 |
11 | 8216945 |
12 | 56463487 |
13 | 406868167 |
14 | 3065920770 |
15 | 24099977863 |
16 | 197179545722 |
17 | 1675846476148 |
18 | 14769104672839 |
19 | 134745258569108 |
20 | 1270767279092285 |
21 | 12371426210292311 |
22 | 124173909409948575 |
23 | 1283498833928098171 |
[1,4,15,60,262,1243,6358,34835,203307,1257913, 8216945,56463487,406868167,3065920770,24099977863, 197179545722,1675846476148,14769104672839, 134745258569108,1270767279092285, 12371426210292311,124173909409948575, 1283498833928098171] |