n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 66 |
3 | 455 |
4 | 3060 |
5 | 20349 |
6 | 134596 |
7 | 888030 |
8 | 5852925 |
9 | 38567100 |
10 | 254186856 |
11 | 1676056044 |
12 | 11058116888 |
13 | 73006209045 |
14 | 482320623240 |
15 | 3188675231420 |
16 | 21094923659355 |
17 | 139646485582065 |
18 | 925029565741050 |
19 | 6131164307078475 |
20 | 40661170824914640 |
21 | 269807672771096460 |
[1,9,66,455,3060,20349,134596,888030,5852925, 38567100,254186856,1676056044,11058116888, 73006209045,482320623240,3188675231420, 21094923659355,139646485582065,925029565741050, 6131164307078475,40661170824914640, 269807672771096460] |