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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 28 |
| 2 | 503 |
| 3 | 7394 |
| 4 | 96993 |
| 5 | 1183584 |
| 6 | 13750411 |
| 7 | 154260238 |
| 8 | 1686734885 |
| 9 | 18091012940 |
| 10 | 191193729519 |
| 11 | 1997666285082 |
| 12 | 20686716623977 |
| 13 | 212717150997496 |
| 14 | 2175158274827027 |
| 15 | 22143785088967526 |
| 16 | 224633627211465069 |
[1,28,503,7394,96993,1183584,13750411,154260238, 1686734885,18091012940,191193729519,1997666285082, 20686716623977,212717150997496,2175158274827027, 22143785088967526,224633627211465069] |