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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 195 |
| 4 | 4440 |
| 5 | 147745 |
| 6 | 6698448 |
| 7 | 394852577 |
| 8 | 29250137472 |
| 9 | 2652483234033 |
| 10 | 288363456748800 |
| 11 | 36952298766628465 |
| 12 | 5504130616452258816 |
| 13 | 941845623036360908489 |
| 14 | 183298110723156455921664 |
| 15 | 40221612394630225987208625 |
| 16 | 9876429434585097671993032704 |
[1,2,14,195,4440,147745,6698448,394852577, 29250137472,2652483234033,288363456748800, 36952298766628465,5504130616452258816, 941845623036360908489,183298110723156455921664, 40221612394630225987208625, 9876429434585097671993032704] |