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| n | a(n) |
|---|---|
| 1 | 44 |
| 2 | 136 |
| 3 | 452 |
| 4 | 1576 |
| 5 | 5684 |
| 6 | 21016 |
| 7 | 79172 |
| 8 | 302536 |
| 9 | 1168724 |
| 10 | 4552696 |
| 11 | 17848292 |
| 12 | 70313896 |
| 13 | 278034164 |
| 14 | 1102505176 |
| 15 | 4381191812 |
| 16 | 17438411656 |
| 17 | 69494842004 |
| 18 | 277203478456 |
| 19 | 1106487293732 |
| 20 | 4418971411816 |
| 21 | 17654956552244 |
| 22 | 70557047312536 |
[44,136,452,1576,5684,21016,79172,302536,1168724, 4552696,17848292,70313896,278034164,1102505176, 4381191812,17438411656,69494842004,277203478456, 1106487293732,4418971411816,17654956552244, 70557047312536] |