n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 16 |
7 | 36 |
8 | 106 |
9 | 442 |
10 | 1786 |
11 | 6106 |
12 | 23596 |
13 | 120836 |
14 | 631632 |
15 | 2854216 |
16 | 13590396 |
17 | 81258556 |
18 | 510768316 |
19 | 2839808572 |
20 | 16008902296 |
21 | 108643656136 |
22 | 787965516416 |
23 | 5161270717296 |
24 | 33513036683512 |
25 | 253407796702776 |
26 | 2065728484459576 |
27 | 15485032349429176 |
28 | 113510664648701776 |
[1,1,1,1,2,6,16,36,106,442,1786,6106,23596,120836, 631632,2854216,13590396,81258556,510768316, 2839808572,16008902296,108643656136,787965516416, 5161270717296,33513036683512,253407796702776, 2065728484459576,15485032349429176, 113510664648701776] |