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| n | a(n) |
|---|---|
| 0 | 4140 |
| 1 | 13082 |
| 2 | 43263 |
| 3 | 149410 |
| 4 | 537813 |
| 5 | 2014321 |
| 6 | 7837862 |
| 7 | 31638625 |
| 8 | 132315780 |
| 9 | 987249425 |
| 10 | 7720099374 |
| 11 | 63062607986 |
| 12 | 536630151980 |
| 13 | 4745723848055 |
| 14 | 43526640405784 |
| 15 | 413274586529605 |
| 16 | 4055497274641836 |
| 17 | 41070826997417960 |
| 18 | 428675590308479674 |
| 19 | 4605781700350245569 |
[4140,13082,43263,149410,537813,2014321,7837862, 31638625,132315780,987249425,7720099374, 63062607986,536630151980,4745723848055, 43526640405784,413274586529605,4055497274641836, 41070826997417960,428675590308479674, 4605781700350245569] |