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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 154 |
| 3 | 1744 |
| 4 | 19574 |
| 5 | 237348 |
| 6 | 2886016 |
| 7 | 35380112 |
| 8 | 446342246 |
| 9 | 5529256528 |
| 10 | 70948896558 |
| 11 | 887325882364 |
| 12 | 11494042429460 |
| 13 | 144804789146232 |
| 14 | 1887744535279984 |
| 15 | 23911022925991996 |
| 16 | 313197804513008262 |
[16,154,1744,19574,237348,2886016,35380112, 446342246,5529256528,70948896558,887325882364, 11494042429460,144804789146232,1887744535279984, 23911022925991996,313197804513008262] |