The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 271 |
| 3 | 2266 |
| 4 | 15399 |
| 5 | 285366 |
| 6 | 3650122 |
| 7 | 39608385 |
| 8 | 518787061 |
| 9 | 6686146382 |
| 10 | 81902283398 |
| 11 | 1032256490947 |
| 12 | 13096735519428 |
| 13 | 164428864143823 |
| 14 | 2070803545260672 |
| 15 | 26150087072053258 |
| 16 | 329684472487581670 |
[1,271,2266,15399,285366,3650122,39608385, 518787061,6686146382,81902283398,1032256490947, 13096735519428,164428864143823,2070803545260672, 26150087072053258,329684472487581670] |