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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 28 |
| 7 | 239 |
| 8 | 2789 |
| 9 | 24970 |
| 10 | 247089 |
| 11 | 2289028 |
| 12 | 23926282 |
| 13 | 244031780 |
| 14 | 2795283827 |
| 15 | 32671509063 |
| 16 | 426329260855 |
| 17 | 5714045982473 |
| 18 | 86176948036417 |
| 19 | 1327311505233240 |
| 20 | 22831768389870460 |
| 21 | 401597165962560396 |
| 22 | 7782893107559342148 |
| 23 | 153285768850390602735 |
| 24 | 3316598607281771351415 |
[1,0,0,0,0,0,28,239,2789,24970,247089,2289028, 23926282,244031780,2795283827,32671509063, 426329260855,5714045982473,86176948036417, 1327311505233240,22831768389870460, 401597165962560396,7782893107559342148, 153285768850390602735,3316598607281771351415] |