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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 10 |
| 3 | 36 |
| 4 | 72 |
| 5 | 353 |
| 6 | 1525 |
| 7 | 5601 |
| 8 | 20603 |
| 9 | 93180 |
| 10 | 376067 |
| 11 | 1440298 |
| 12 | 6219533 |
| 13 | 25449350 |
| 14 | 101546963 |
| 15 | 425583385 |
| 16 | 1746282597 |
| 17 | 7098263711 |
| 18 | 29371457881 |
| 19 | 120619016253 |
| 20 | 493714118241 |
| 21 | 2033241533001 |
| 22 | 8352126707843 |
| 23 | 34269831877530 |
| 24 | 140900257953996 |
[2,10,36,72,353,1525,5601,20603,93180,376067, 1440298,6219533,25449350,101546963,425583385, 1746282597,7098263711,29371457881,120619016253, 493714118241,2033241533001,8352126707843, 34269831877530,140900257953996] |