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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 33 |
| 3 | 202 |
| 4 | 1111 |
| 5 | 5639 |
| 6 | 29190 |
| 7 | 153715 |
| 8 | 817865 |
| 9 | 4363976 |
| 10 | 23310791 |
| 11 | 124634939 |
| 12 | 666885018 |
| 13 | 3570183285 |
| 14 | 19119296745 |
| 15 | 102409115514 |
| 16 | 548602179057 |
| 17 | 2939069643391 |
| 18 | 15746490425394 |
| 19 | 84366772518821 |
| 20 | 452030585522887 |
[5,33,202,1111,5639,29190,153715,817865,4363976, 23310791,124634939,666885018,3570183285, 19119296745,102409115514,548602179057, 2939069643391,15746490425394,84366772518821, 452030585522887] |