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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 33 |
| 4 | 436 |
| 5 | 8015 |
| 6 | 189596 |
| 7 | 5494797 |
| 8 | 188692708 |
| 9 | 7494744807 |
| 10 | 338103170428 |
| 11 | 17079035749061 |
| 12 | 955117390512858 |
| 13 | 58584586487137113 |
| 14 | 3910851585418994256 |
| 15 | 282272352712037938081 |
| 16 | 21904366942822876046020 |
[1,4,33,436,8015,189596,5494797,188692708, 7494744807,338103170428,17079035749061, 955117390512858,58584586487137113, 3910851585418994256,282272352712037938081, 21904366942822876046020] |