n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 1 |
4 | 11 |
5 | 21 |
6 | 117 |
7 | 428 |
8 | 2172 |
9 | 10727 |
10 | 59393 |
11 | 345335 |
12 | 2143825 |
13 | 14038324 |
14 | 96834090 |
15 | 700715993 |
16 | 5305041715 |
17 | 41910528809 |
18 | 344714251149 |
19 | 2945819805408 |
20 | 26107419715988 |
21 | 239556359980239 |
22 | 2272364911439153 |
23 | 22252173805170347 |
24 | 224666265799310801 |
25 | 2335958333831561032 |
[0,2,1,11,21,117,428,2172,10727,59393,345335, 2143825,14038324,96834090,700715993,5305041715, 41910528809,344714251149,2945819805408, 26107419715988,239556359980239,2272364911439153, 22252173805170347,224666265799310801, 2335958333831561032] |