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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 24 |
| 2 | 100 |
| 3 | 400 |
| 4 | 1575 |
| 5 | 6160 |
| 6 | 24024 |
| 7 | 93600 |
| 8 | 364650 |
| 9 | 1421200 |
| 10 | 5542680 |
| 11 | 21633248 |
| 12 | 84504875 |
| 13 | 330372000 |
| 14 | 1292646000 |
| 15 | 5061729600 |
| 16 | 19835652870 |
| 17 | 77786874000 |
| 18 | 305254551000 |
| 19 | 1198665468000 |
| 20 | 4709756401350 |
| 21 | 18516070880736 |
| 22 | 72834194898000 |
| 23 | 286645366072000 |
| 24 | 1128666128908500 |
[5,24,100,400,1575,6160,24024,93600,364650, 1421200,5542680,21633248,84504875,330372000, 1292646000,5061729600,19835652870,77786874000, 305254551000,1198665468000,4709756401350, 18516070880736,72834194898000,286645366072000, 1128666128908500] |