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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 44 |
| 3 | 144 |
| 4 | 486 |
| 5 | 1582 |
| 6 | 5478 |
| 7 | 18692 |
| 8 | 64782 |
| 9 | 223272 |
| 10 | 776430 |
| 11 | 2701660 |
| 12 | 9439702 |
| 13 | 33021250 |
| 14 | 115801892 |
| 15 | 406698282 |
| 16 | 1430840312 |
| 17 | 5040451088 |
| 18 | 17779563894 |
| 19 | 62784860258 |
| 20 | 221948186878 |
| 21 | 785340477204 |
| 22 | 2781302241584 |
| 23 | 9857972484436 |
[10,44,144,486,1582,5478,18692,64782,223272, 776430,2701660,9439702,33021250,115801892, 406698282,1430840312,5040451088,17779563894, 62784860258,221948186878,785340477204, 2781302241584,9857972484436] |