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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 43 |
| 3 | 658 |
| 4 | 11029 |
| 5 | 189376 |
| 6 | 3272959 |
| 7 | 56665678 |
| 8 | 981535273 |
| 9 | 17003856124 |
| 10 | 294580477651 |
| 11 | 5103458162314 |
| 12 | 88415060881213 |
| 13 | 1531751228239288 |
| 14 | 26536907089886119 |
| 15 | 459740106490112326 |
| 16 | 7964792868501695569 |
[4,43,658,11029,189376,3272959,56665678,981535273, 17003856124,294580477651,5103458162314, 88415060881213,1531751228239288,26536907089886119, 459740106490112326,7964792868501695569] |