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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 203 |
| 2 | 19232 |
| 3 | 904580 |
| 4 | 24537905 |
| 5 | 425677958 |
| 6 | 5064948309 |
| 7 | 43418499491 |
| 8 | 277921468720 |
| 9 | 1364366313210 |
| 10 | 5242437628968 |
| 11 | 16014094403124 |
| 12 | 39357448344781 |
| 13 | 78528595223300 |
| 14 | 128048008057615 |
| 15 | 171403741608326 |
| 16 | 188847475249322 |
| 17 | 171403741608326 |
| 18 | 128048008057615 |
| 19 | 78528595223300 |
[1,203,19232,904580,24537905,425677958,5064948309, 43418499491,277921468720,1364366313210, 5242437628968,16014094403124,39357448344781, 78528595223300,128048008057615,171403741608326, 188847475249322,171403741608326,128048008057615, 78528595223300] |