The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 27 |
| 4 | 96 |
| 5 | 330 |
| 6 | 1008 |
| 7 | 3059 |
| 8 | 8408 |
| 9 | 23526 |
| 10 | 64540 |
| 11 | 175197 |
| 12 | 480852 |
| 13 | 1304498 |
| 14 | 3523884 |
| 15 | 9557955 |
| 16 | 25874752 |
| 17 | 70115412 |
| 18 | 189961182 |
| 19 | 514272411 |
| 20 | 1394193580 |
| 21 | 3779849598 |
| 22 | 10246935644 |
| 23 | 27788566029 |
| 24 | 75370121160 |
| 25 | 204475052375 |
| 26 | 554805820452 |
| 27 | 1505578023621 |
| 28 | 4086199301996 |
| 29 | 11091501630949 |
[2,27,96,330,1008,3059,8408,23526,64540,175197, 480852,1304498,3523884,9557955,25874752,70115412, 189961182,514272411,1394193580,3779849598, 10246935644,27788566029,75370121160,204475052375, 554805820452,1505578023621,4086199301996, 11091501630949] |