The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 142 |
| 3 | 4607 |
| 4 | 107007 |
| 5 | 2231690 |
| 6 | 42681282 |
| 7 | 774403237 |
| 8 | 13508097744 |
| 9 | 228643318057 |
| 10 | 3779831485411 |
| 11 | 61301958031506 |
| 12 | 978593190144974 |
| 13 | 15415280790236212 |
| 14 | 240088085281666402 |
| 15 | 3702829542983428526 |
| 16 | 56621929465854143683 |
[2,142,4607,107007,2231690,42681282,774403237, 13508097744,228643318057,3779831485411, 61301958031506,978593190144974,15415280790236212, 240088085281666402,3702829542983428526, 56621929465854143683] |