The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2900 |
| 2 | 9328 |
| 3 | 30312 |
| 4 | 101464 |
| 5 | 345280 |
| 6 | 1201872 |
| 7 | 4256548 |
| 8 | 15381300 |
| 9 | 56526280 |
| 10 | 211590104 |
| 11 | 804635776 |
| 12 | 3110475000 |
| 13 | 12194766820 |
| 14 | 48482860692 |
| 15 | 195060662440 |
| 16 | 793719896600 |
| 17 | 3260655523872 |
| 18 | 13512949591560 |
| 19 | 56412040046244 |
[2900,9328,30312,101464,345280,1201872,4256548, 15381300,56526280,211590104,804635776,3110475000, 12194766820,48482860692,195060662440,793719896600, 3260655523872,13512949591560,56412040046244] |