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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 24 |
| 3 | 122 |
| 4 | 808 |
| 5 | 10412 |
| 6 | 111254 |
| 7 | 817148 |
| 8 | 1640691 |
| 9 | 24699895 |
| 10 | 186114323 |
| 11 | 186114323 |
| 12 | 6118094552 |
| 13 | 6118094552 |
| 14 | 490563146587 |
| 15 | 2525232365134 |
| 16 | 26263039914849 |
| 17 | 59495970484450 |
| 18 | 1222648540420485 |
| 19 | 6107889334151832 |
| 20 | 74501260446390690 |
| 21 | 234085793041614692 |
| 22 | 1351177521208182706 |
| 23 | 24810103812706111000 |
| 24 | 134285093173029776372 |
[0,3,24,122,808,10412,111254,817148,1640691, 24699895,186114323,186114323,6118094552, 6118094552,490563146587,2525232365134, 26263039914849,59495970484450,1222648540420485, 6107889334151832,74501260446390690, 234085793041614692,1351177521208182706, 24810103812706111000,134285093173029776372] |