n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 6 |
4 | 29 |
5 | 139 |
6 | 692 |
7 | 3627 |
8 | 20085 |
9 | 117488 |
10 | 724731 |
11 | 4703699 |
12 | 32043002 |
13 | 228572813 |
14 | 1703454469 |
15 | 13235230990 |
16 | 106997762361 |
17 | 898404819935 |
18 | 7821618182572 |
19 | 70498093658879 |
20 | 656892909516441 |
21 | 6319385054660256 |
22 | 62688326727955007 |
23 | 640525850674446471 |
24 | 6733883466256420010 |
[0,1,6,29,139,692,3627,20085,117488,724731, 4703699,32043002,228572813,1703454469,13235230990, 106997762361,898404819935,7821618182572, 70498093658879,656892909516441,6319385054660256, 62688326727955007,640525850674446471, 6733883466256420010] |