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| n | a(n) |
|---|---|
| 1 | 2772 |
| 2 | 7736 |
| 3 | 21648 |
| 4 | 60744 |
| 5 | 170928 |
| 6 | 482388 |
| 7 | 1365524 |
| 8 | 3889132 |
| 9 | 11085704 |
| 10 | 31624832 |
| 11 | 90291712 |
| 12 | 257986472 |
| 13 | 737641956 |
| 14 | 2111829480 |
| 15 | 6047886156 |
| 16 | 17324092484 |
| 17 | 49634779596 |
| 18 | 142232471640 |
| 19 | 407642504688 |
| 20 | 1168643504468 |
| 21 | 3350608310100 |
[2772,7736,21648,60744,170928,482388,1365524, 3889132,11085704,31624832,90291712,257986472, 737641956,2111829480,6047886156,17324092484, 49634779596,142232471640,407642504688, 1168643504468,3350608310100] |