The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 28 |
| 3 | 71 |
| 4 | 290 |
| 5 | 1266 |
| 6 | 4733 |
| 7 | 18855 |
| 8 | 76887 |
| 9 | 308978 |
| 10 | 1246767 |
| 11 | 5062234 |
| 12 | 20532276 |
| 13 | 83375626 |
| 14 | 339110674 |
| 15 | 1379336250 |
| 16 | 5613495282 |
| 17 | 22857004715 |
| 18 | 93078076884 |
| 19 | 379120762123 |
| 20 | 1544499065379 |
| 21 | 6292491958997 |
| 22 | 25638948167920 |
| 23 | 104473946952179 |
[8,28,71,290,1266,4733,18855,76887,308978,1246767, 5062234,20532276,83375626,339110674,1379336250, 5613495282,22857004715,93078076884,379120762123, 1544499065379,6292491958997,25638948167920, 104473946952179] |