n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 31 |
3 | 61 |
4 | 991 |
5 | 2821 |
6 | 32551 |
7 | 117181 |
8 | 1093711 |
9 | 4609141 |
10 | 37420471 |
11 | 175694701 |
12 | 1298308831 |
13 | 6569149861 |
14 | 45518414791 |
15 | 242592910621 |
16 | 1608145354351 |
17 | 8885932672981 |
18 | 57130293303511 |
19 | 323708273492941 |
20 | 2037617072598271 |
[1,1,31,61,991,2821,32551,117181,1093711,4609141, 37420471,175694701,1298308831,6569149861, 45518414791,242592910621,1608145354351, 8885932672981,57130293303511,323708273492941, 2037617072598271] |