| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 12 |
| 4 | 14 |
| 5 | 60 |
| 6 | 248 |
| 7 | 336 |
| 8 | 2160 |
| 9 | 2340 |
| 10 | 4064 |
| 11 | 13104 |
| 12 | 15120 |
| 13 | 16380 |
| 14 | 261888 |
| 15 | 1089270 |
| 16 | 4455360 |
| 17 | 8714160 |
| 18 | 10213632 |
| 19 | 11784960 |
| 20 | 16775168 |
| 21 | 22766400 |
| 22 | 45981824 |
| 23 | 71495424 |
| 24 | 98532480 |
| 25 | 229909120 |
| 26 | 689727360 |
| 27 | 738152448 |
| 28 | 4291822080 |
| 29 | 4294934528 |
| 30 | 5100118016 |
| 31 | 7091219520 |
[1,3,12,14,60,248,336,2160,2340,4064,13104,15120, 16380,261888,1089270,4455360,8714160,10213632, 11784960,16775168,22766400,45981824,71495424, 98532480,229909120,689727360,738152448,4291822080, 4294934528,5100118016,7091219520] |