The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 16 |
| 3 | 159 |
| 4 | 1336 |
| 5 | 7770 |
| 6 | 39768 |
| 7 | 158242 |
| 8 | 576277 |
| 9 | 1770957 |
| 10 | 5103172 |
| 11 | 13020114 |
| 12 | 32106338 |
| 13 | 71312200 |
| 14 | 155419661 |
| 15 | 313496424 |
| 16 | 622375358 |
| 17 | 1154635735 |
| 18 | 2140048203 |
| 19 | 3718742275 |
| 20 | 6493401148 |
| 21 | 10741764465 |
| 22 | 17813177343 |
| 23 | 28173574540 |
| 24 | 45107483725 |
[1,16,159,1336,7770,39768,158242,576277,1770957, 5103172,13020114,32106338,71312200,155419661, 313496424,622375358,1154635735,2140048203, 3718742275,6493401148,10741764465,17813177343, 28173574540,45107483725] |