n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 87 |
4 | 409 |
5 | 2066 |
6 | 11155 |
7 | 64077 |
8 | 389946 |
9 | 2504665 |
10 | 16923381 |
11 | 119928232 |
12 | 888980293 |
13 | 6876320041 |
14 | 55382419676 |
15 | 463539664643 |
16 | 4024626253845 |
17 | 36189297168874 |
18 | 336513491259647 |
19 | 3231446022478129 |
20 | 32004743929977258 |
21 | 326548129128737469 |
22 | 3428663026172389201 |
[1,5,20,87,409,2066,11155,64077,389946,2504665, 16923381,119928232,888980293,6876320041, 55382419676,463539664643,4024626253845, 36189297168874,336513491259647,3231446022478129, 32004743929977258,326548129128737469, 3428663026172389201] |