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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 32 |
| 4 | 272 |
| 5 | 2957 |
| 6 | 39531 |
| 7 | 629806 |
| 8 | 11673074 |
| 9 | 247028567 |
| 10 | 5881190801 |
| 11 | 155651692748 |
| 12 | 4534744862052 |
| 13 | 144246963009697 |
| 14 | 4975152075900887 |
| 15 | 184958685188293274 |
| 16 | 7373625038400716198 |
| 17 | 313817002976857310507 |
| 18 | 14201832585602869616349 |
| 19 | 681022860320979979626232 |
[1,1,5,32,272,2957,39531,629806,11673074, 247028567,5881190801,155651692748,4534744862052, 144246963009697,4975152075900887, 184958685188293274,7373625038400716198, 313817002976857310507,14201832585602869616349, 681022860320979979626232] |