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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 146 |
| 3 | 760 |
| 4 | 6110 |
| 5 | 40395 |
| 6 | 292781 |
| 7 | 2043848 |
| 8 | 14419536 |
| 9 | 101511446 |
| 10 | 713030990 |
| 11 | 5019470018 |
| 12 | 35283108018 |
| 13 | 248180957058 |
| 14 | 1745222920651 |
| 15 | 12274305388046 |
| 16 | 86321053540385 |
| 17 | 607085317234430 |
| 18 | 4269538885720366 |
| 19 | 30026989609915629 |
[3,146,760,6110,40395,292781,2043848,14419536, 101511446,713030990,5019470018,35283108018, 248180957058,1745222920651,12274305388046, 86321053540385,607085317234430,4269538885720366, 30026989609915629] |