The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 78 |
| 4 | 1278 |
| 5 | 10002 |
| 6 | 50191 |
| 7 | 189208 |
| 8 | 584958 |
| 9 | 1563488 |
| 10 | 3737987 |
| 11 | 8181786 |
| 12 | 16669638 |
| 13 | 32003238 |
| 14 | 58438623 |
| 15 | 102234772 |
| 16 | 172344406 |
| 17 | 281269668 |
| 18 | 446107043 |
| 19 | 689807558 |
| 20 | 1042679982 |
| 21 | 1544166426 |
| 22 | 2244921423 |
| 23 | 3209227248 |
| 24 | 4517779918 |
[0,1,78,1278,10002,50191,189208,584958,1563488, 3737987,8181786,16669638,32003238,58438623, 102234772,172344406,281269668,446107043,689807558, 1042679982,1544166426,2244921423,3209227248, 4517779918] |