n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 9 |
3 | 73 |
4 | 593 |
5 | 4817 |
6 | 39129 |
7 | 317849 |
8 | 2581921 |
9 | 20973217 |
10 | 170367657 |
11 | 1383914473 |
12 | 11241683441 |
13 | 91317382001 |
14 | 741780739449 |
15 | 6025563297593 |
16 | 48946287120193 |
17 | 397595860259137 |
18 | 3229713169193289 |
19 | 26235301213805449 |
20 | 213112122879636881 |
[1,1,9,73,593,4817,39129,317849,2581921,20973217, 170367657,1383914473,11241683441,91317382001, 741780739449,6025563297593,48946287120193, 397595860259137,3229713169193289, 26235301213805449,213112122879636881] |