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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 5 |
| 4 | 44 |
| 5 | 49 |
| 6 | 191 |
| 7 | 240 |
| 8 | 2111 |
| 9 | 2351 |
| 10 | 9164 |
| 11 | 11515 |
| 12 | 101284 |
| 13 | 112799 |
| 14 | 439681 |
| 15 | 552480 |
| 16 | 4859521 |
| 17 | 5412001 |
| 18 | 21095524 |
| 19 | 26507525 |
| 20 | 233155724 |
| 21 | 259663249 |
| 22 | 1012145471 |
| 23 | 1271808720 |
| 24 | 11186615231 |
| 25 | 12458423951 |
[1,1,4,5,44,49,191,240,2111,2351,9164,11515, 101284,112799,439681,552480,4859521,5412001, 21095524,26507525,233155724,259663249,1012145471, 1271808720,11186615231,12458423951] |