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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 31 |
| 3 | 2434 |
| 4 | 17899 |
| 5 | 231921 |
| 6 | 5511367 |
| 7 | 123361724 |
| 8 | 2122878239 |
| 9 | 39737434692 |
| 10 | 798393620079 |
| 11 | 15715764101797 |
| 12 | 301272429965474 |
| 13 | 5838287390984909 |
| 14 | 114058126922015948 |
| 15 | 2220151290688134573 |
| 16 | 43095024081743706131 |
[1,31,2434,17899,231921,5511367,123361724, 2122878239,39737434692,798393620079, 15715764101797,301272429965474,5838287390984909, 114058126922015948,2220151290688134573, 43095024081743706131] |