The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 15 |
| 3 | 275 |
| 4 | 5034 |
| 5 | 80626 |
| 6 | 1222363 |
| 7 | 18438929 |
| 8 | 279285399 |
| 9 | 4237530095 |
| 10 | 64300829449 |
| 11 | 975566486675 |
| 12 | 14800469958185 |
| 13 | 224540402345213 |
| 14 | 3406558215857382 |
| 15 | 51681816786790684 |
| 16 | 784078741397570677 |
| 17 | 11895467318139343215 |
| 18 | 180469294422664219486 |
| 19 | 2737947622842077799930 |
[15,275,5034,80626,1222363,18438929,279285399, 4237530095,64300829449,975566486675, 14800469958185,224540402345213,3406558215857382, 51681816786790684,784078741397570677, 11895467318139343215,180469294422664219486, 2737947622842077799930] |