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| n | a(n) |
|---|---|
| 1 | 220 |
| 2 | 2310 |
| 3 | 24280 |
| 4 | 255510 |
| 5 | 2692030 |
| 6 | 28396180 |
| 7 | 299874470 |
| 8 | 3170351150 |
| 9 | 33554420380 |
| 10 | 355508955450 |
| 11 | 3770437474330 |
| 12 | 40027054951800 |
| 13 | 425319384572170 |
| 14 | 4523288178641650 |
| 15 | 48144647645503520 |
| 16 | 512829600353346710 |
[220,2310,24280,255510,2692030,28396180,299874470, 3170351150,33554420380,355508955450,3770437474330, 40027054951800,425319384572170,4523288178641650, 48144647645503520,512829600353346710] |