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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 16 |
| 4 | 197 |
| 5 | 5556 |
| 6 | 402727 |
| 7 | 68650114 |
| 8 | 28060721817 |
| 9 | 25837746071608 |
| 10 | 54301560755743691 |
| 11 | 252957269930383300734 |
| 12 | 2621503487300921168212357 |
| 13 | 59671929727060536957652131604 |
| 14 | 2977392188346587645059521680164959 |
[1,1,3,16,197,5556,402727,68650114,28060721817, 25837746071608,54301560755743691, 252957269930383300734,2621503487300921168212357, 59671929727060536957652131604, 2977392188346587645059521680164959] |