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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 162 |
| 3 | 450 |
| 4 | 2334 |
| 5 | 11624 |
| 6 | 57984 |
| 7 | 290927 |
| 8 | 1465435 |
| 9 | 7376949 |
| 10 | 37148115 |
| 11 | 187150874 |
| 12 | 943024281 |
| 13 | 4751935274 |
| 14 | 23946771826 |
| 15 | 120679612086 |
| 16 | 608149528211 |
| 17 | 3064647978801 |
| 18 | 15443791732842 |
| 19 | 77826897454970 |
| 20 | 392197493948848 |
[12,162,450,2334,11624,57984,290927,1465435, 7376949,37148115,187150874,943024281,4751935274, 23946771826,120679612086,608149528211, 3064647978801,15443791732842,77826897454970, 392197493948848] |