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| n | a(n) |
|---|---|
| 1 | 220 |
| 2 | 1982 |
| 3 | 17216 |
| 4 | 157312 |
| 5 | 1405454 |
| 6 | 12770802 |
| 7 | 114913804 |
| 8 | 1040818716 |
| 9 | 9388632290 |
| 10 | 84916233072 |
| 11 | 766719557970 |
| 12 | 6930512776886 |
| 13 | 62601134362556 |
| 14 | 565720424690948 |
| 15 | 5110812449111474 |
| 16 | 46181028008719378 |
| 17 | 417235865422683956 |
[220,1982,17216,157312,1405454,12770802,114913804, 1040818716,9388632290,84916233072,766719557970, 6930512776886,62601134362556,565720424690948, 5110812449111474,46181028008719378, 417235865422683956] |