n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 19 |
4 | 81 |
5 | 351 |
6 | 1553 |
7 | 6959 |
8 | 31489 |
9 | 143551 |
10 | 658305 |
11 | 3033471 |
12 | 14034177 |
13 | 65147135 |
14 | 303285505 |
15 | 1415422719 |
16 | 6620053505 |
17 | 31021657087 |
18 | 145613977601 |
19 | 684537354239 |
20 | 3222408929281 |
21 | 15187861143551 |
22 | 71663163121665 |
[1,1,5,19,81,351,1553,6959,31489,143551,658305, 3033471,14034177,65147135,303285505,1415422719, 6620053505,31021657087,145613977601,684537354239, 3222408929281,15187861143551,71663163121665] |