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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 43 |
| 3 | 718 |
| 4 | 14779 |
| 5 | 344452 |
| 6 | 8725093 |
| 7 | 234594766 |
| 8 | 6596287411 |
| 9 | 192032529388 |
| 10 | 5747827847545 |
| 11 | 175986201591130 |
| 12 | 5490952102178725 |
| 13 | 174077883157001740 |
| 14 | 5594651323154783515 |
| 15 | 181946073109880839450 |
| 16 | 5978730547304013537475 |
| 17 | 198263347772478727193740 |
| 18 | 6628299876919271425393105 |
| 19 | 223211734849614639629628010 |
| 20 | 7566093949269408444819804937 |
[1,4,43,718,14779,344452,8725093,234594766, 6596287411,192032529388,5747827847545, 175986201591130,5490952102178725, 174077883157001740,5594651323154783515, 181946073109880839450,5978730547304013537475, 198263347772478727193740, 6628299876919271425393105, 223211734849614639629628010, 7566093949269408444819804937] |