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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 16 |
| 5 | 38 |
| 6 | 96 |
| 7 | 262 |
| 8 | 767 |
| 9 | 2346 |
| 10 | 7315 |
| 11 | 22954 |
| 12 | 72239 |
| 13 | 228484 |
| 14 | 730470 |
| 15 | 2379669 |
| 16 | 7960733 |
| 17 | 27453387 |
| 18 | 97418566 |
| 19 | 353442491 |
| 20 | 1300699953 |
| 21 | 4821108695 |
| 22 | 17903653177 |
| 23 | 66375491706 |
| 24 | 245111697148 |
| 25 | 900578294735 |
| 26 | 3292301955863 |
| 27 | 11991348060873 |
| 28 | 43624020578230 |
| 29 | 159059383244035 |
| 30 | 583396507916927 |
[1,3,7,16,38,96,262,767,2346,7315,22954,72239, 228484,730470,2379669,7960733,27453387,97418566, 353442491,1300699953,4821108695,17903653177, 66375491706,245111697148,900578294735, 3292301955863,11991348060873,43624020578230, 159059383244035,583396507916927] |