n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 73 |
6 | 272 |
7 | 1054 |
8 | 4214 |
9 | 17226 |
10 | 71623 |
11 | 302252 |
12 | 1292432 |
13 | 5581926 |
14 | 24319777 |
15 | 106774166 |
16 | 471860548 |
17 | 2097325988 |
18 | 9369510453 |
19 | 42044499840 |
20 | 189429350786 |
21 | 856534717875 |
22 | 3885495872594 |
23 | 17677575370337 |
24 | 80641091022357 |
25 | 368762780681781 |
26 | 1690078200540330 |
27 | 7761698620206097 |
28 | 35713157961834317 |
[1,1,2,6,21,73,272,1054,4214,17226,71623,302252, 1292432,5581926,24319777,106774166,471860548, 2097325988,9369510453,42044499840,189429350786, 856534717875,3885495872594,17677575370337, 80641091022357,368762780681781,1690078200540330, 7761698620206097,35713157961834317] |