n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 42 |
5 | 136 |
6 | 591 |
7 | 2082 |
8 | 9311 |
9 | 34685 |
10 | 157638 |
11 | 608881 |
12 | 2797083 |
13 | 11084537 |
14 | 51304738 |
15 | 207277076 |
16 | 964911964 |
17 | 3957470838 |
18 | 18504551737 |
19 | 76820763679 |
20 | 360469021179 |
21 | 1511484050587 |
22 | 7112923455889 |
23 | 30076451061115 |
24 | 141879103647396 |
25 | 604235544127547 |
26 | 2856174424066251 |
27 | 12239406949509384 |
[1,1,4,10,42,136,591,2082,9311,34685,157638, 608881,2797083,11084537,51304738,207277076, 964911964,3957470838,18504551737,76820763679, 360469021179,1511484050587,7112923455889, 30076451061115,141879103647396,604235544127547, 2856174424066251,12239406949509384] |