The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 74 |
| 3 | 230 |
| 4 | 1397 |
| 5 | 11752 |
| 6 | 110249 |
| 7 | 1056816 |
| 8 | 9684995 |
| 9 | 92435041 |
| 10 | 880584819 |
| 11 | 8391672510 |
| 12 | 79962511095 |
| 13 | 763064081276 |
| 14 | 7281278638212 |
| 15 | 69463421784079 |
| 16 | 662816884120372 |
| 17 | 6324400190195839 |
| 18 | 60344941962776127 |
| 19 | 575795288992490918 |
[1,74,230,1397,11752,110249,1056816,9684995, 92435041,880584819,8391672510,79962511095, 763064081276,7281278638212,69463421784079, 662816884120372,6324400190195839, 60344941962776127,575795288992490918] |