n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 19 |
4 | 87 |
5 | 451 |
6 | 2223 |
7 | 11179 |
8 | 55767 |
9 | 279091 |
10 | 1394943 |
11 | 6975739 |
12 | 34876647 |
13 | 174387331 |
14 | 871928463 |
15 | 4359658699 |
16 | 21798260727 |
17 | 108991369171 |
18 | 544956714783 |
19 | 2724783836059 |
20 | 13623918656007 |
21 | 68119594328611 |
22 | 340597969545903 |
[0,1,3,19,87,451,2223,11179,55767,279091,1394943, 6975739,34876647,174387331,871928463,4359658699, 21798260727,108991369171,544956714783, 2724783836059,13623918656007,68119594328611, 340597969545903] |