The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 24 |
| 3 | 154 |
| 4 | 580 |
| 5 | 1665 |
| 6 | 4025 |
| 7 | 8624 |
| 8 | 16884 |
| 9 | 30810 |
| 10 | 53130 |
| 11 | 87450 |
| 12 | 138424 |
| 13 | 211939 |
| 14 | 315315 |
| 15 | 457520 |
| 16 | 649400 |
| 17 | 903924 |
| 18 | 1236444 |
| 19 | 1664970 |
| 20 | 2210460 |
| 21 | 2897125 |
| 22 | 3752749 |
| 23 | 4809024 |
| 24 | 6101900 |
| 25 | 7671950 |
| 26 | 9564750 |
| 27 | 11831274 |
| 28 | 14528304 |
| 29 | 17718855 |
| 30 | 21472615 |
| 31 | 25866400 |
| 32 | 30984624 |
[1,24,154,580,1665,4025,8624,16884,30810,53130, 87450,138424,211939,315315,457520,649400,903924, 1236444,1664970,2210460,2897125,3752749,4809024, 6101900,7671950,9564750,11831274,14528304, 17718855,21472615,25866400,30984624] |