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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 12 |
| 2 | 142 |
| 3 | 1692 |
| 4 | 20162 |
| 5 | 240252 |
| 6 | 2862862 |
| 7 | 34114092 |
| 8 | 406506242 |
| 9 | 4843960812 |
| 10 | 57721023502 |
| 11 | 687808321212 |
| 12 | 8195978831042 |
| 13 | 97663937651292 |
| 14 | 1163771272984462 |
| 15 | 13867591338162252 |
| 16 | 165247324784962562 |
| 17 | 1969100306081388492 |
[2,12,142,1692,20162,240252,2862862,34114092, 406506242,4843960812,57721023502,687808321212, 8195978831042,97663937651292,1163771272984462, 13867591338162252,165247324784962562, 1969100306081388492] |