n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 15 |
3 | 163 |
4 | 2070 |
5 | 28698 |
6 | 421015 |
7 | 6425644 |
8 | 100977137 |
9 | 1622885389 |
10 | 26551709946 |
11 | 440744175801 |
12 | 7404449354076 |
13 | 125657625548824 |
14 | 2150963575012295 |
15 | 37094953102567208 |
16 | 643904274979347286 |
17 | 11241232087809137759 |
18 | 197247501440314516840 |
19 | 3476787208220672891388 |
20 | 61533794803235280779261 |
[1,2,15,163,2070,28698,421015,6425644,100977137, 1622885389,26551709946,440744175801,7404449354076, 125657625548824,2150963575012295, 37094953102567208,643904274979347286, 11241232087809137759,197247501440314516840, 3476787208220672891388,61533794803235280779261] |