| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 174 |
| 3 | 796 |
| 4 | 4258 |
| 5 | 23840 |
| 6 | 134642 |
| 7 | 750733 |
| 8 | 4222383 |
| 9 | 23711537 |
| 10 | 132980654 |
| 11 | 746752625 |
| 12 | 4193871923 |
| 13 | 23544394740 |
| 14 | 132198744673 |
| 15 | 742328077116 |
| 16 | 4168064624507 |
| 17 | 23403479996329 |
| 18 | 131411747457089 |
| 19 | 737875596512806 |
| 20 | 4143166297781819 |
[3,174,796,4258,23840,134642,750733,4222383, 23711537,132980654,746752625,4193871923, 23544394740,132198744673,742328077116, 4168064624507,23403479996329,131411747457089, 737875596512806,4143166297781819] |