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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 14 |
| 3 | 51 |
| 4 | 195 |
| 5 | 663 |
| 6 | 2345 |
| 7 | 7707 |
| 8 | 25744 |
| 9 | 82980 |
| 10 | 267812 |
| 11 | 846150 |
| 12 | 2676163 |
| 13 | 8337189 |
| 14 | 25947281 |
| 15 | 80053128 |
| 16 | 246468551 |
| 17 | 754366239 |
| 18 | 2305139065 |
| 19 | 7014997404 |
| 20 | 21317567297 |
| 21 | 64606020012 |
| 22 | 195557995054 |
| 23 | 590855420007 |
| 24 | 1783577678925 |
| 25 | 5377112705874 |
| 26 | 16199746640340 |
| 27 | 48763788775530 |
| 28 | 146712079122114 |
| 29 | 441146762285301 |
| 30 | 1326002750336702 |
| 31 | 3984148679940612 |
| 32 | 11967872331787643 |
[1,3,14,51,195,663,2345,7707,25744,82980,267812, 846150,2676163,8337189,25947281,80053128, 246468551,754366239,2305139065,7014997404, 21317567297,64606020012,195557995054,590855420007, 1783577678925,5377112705874,16199746640340, 48763788775530,146712079122114,441146762285301, 1326002750336702,3984148679940612, 11967872331787643] |