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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 818 |
| 3 | 75237 |
| 4 | 9704172 |
| 5 | 1610219061 |
| 6 | 326647152627 |
| 7 | 78322576680405 |
| 8 | 21671112063131181 |
| 9 | 6796070676619188507 |
| 10 | 2382079473846244973676 |
| 11 | 922852837565535061715211 |
| 12 | 391585126460697011112411576 |
| 13 | 180608810765895380940822677853 |
| 14 | 89966485333525032479641295540142 |
| 15 | 48135006154108946423894447901622257 |
| 16 | 27530139433795469892705229664410072563 |
| 17 | 16761420605156187498505881406969283279001 |
[1,15,818,75237,9704172,1610219061,326647152627, 78322576680405,21671112063131181, 6796070676619188507,2382079473846244973676, 922852837565535061715211, 391585126460697011112411576, 180608810765895380940822677853, 89966485333525032479641295540142, 48135006154108946423894447901622257, 27530139433795469892705229664410072563, 16761420605156187498505881406969283279001] |