n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 23 |
7 | 65 |
8 | 199 |
9 | 654 |
10 | 2296 |
11 | 8569 |
12 | 33825 |
13 | 140581 |
14 | 612933 |
15 | 2795181 |
16 | 13298407 |
17 | 65851100 |
18 | 338654554 |
19 | 1805083341 |
20 | 9952373825 |
21 | 56645932971 |
22 | 332111798479 |
23 | 2000990363889 |
24 | 12357518954759 |
25 | 78010845456554 |
26 | 501994699807228 |
[1,1,2,4,9,23,65,199,654,2296,8569,33825,140581, 612933,2795181,13298407,65851100,338654554, 1805083341,9952373825,56645932971,332111798479, 2000990363889,12357518954759,78010845456554, 501994699807228] |