n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 22 |
4 | 130 |
5 | 803 |
6 | 5085 |
7 | 32747 |
8 | 213419 |
9 | 1403399 |
10 | 9292850 |
11 | 61877337 |
12 | 413894378 |
13 | 2779029389 |
14 | 18719276722 |
15 | 126438191373 |
16 | 856054836170 |
17 | 5808041074705 |
18 | 39478084788582 |
19 | 268776967284806 |
20 | 1832579782914892 |
21 | 12511376749656415 |
[1,4,22,130,803,5085,32747,213419,1403399,9292850, 61877337,413894378,2779029389,18719276722, 126438191373,856054836170,5808041074705, 39478084788582,268776967284806,1832579782914892, 12511376749656415] |