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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 7 |
| 4 | 14 |
| 5 | 30 |
| 6 | 83 |
| 7 | 255 |
| 8 | 807 |
| 9 | 2482 |
| 10 | 7399 |
| 11 | 21518 |
| 12 | 61752 |
| 13 | 176385 |
| 14 | 504181 |
| 15 | 1445159 |
| 16 | 4153716 |
| 17 | 11960039 |
| 18 | 34463630 |
| 19 | 99316022 |
| 20 | 286133435 |
| 21 | 824112803 |
| 22 | 2373059251 |
| 23 | 6832536414 |
| 24 | 19671776119 |
| 25 | 56638681010 |
| 26 | 163078362040 |
| 27 | 469559902129 |
| 28 | 1352048562017 |
| 29 | 3893102975595 |
| 30 | 11209833959312 |
[1,2,4,7,14,30,83,255,807,2482,7399,21518,61752, 176385,504181,1445159,4153716,11960039,34463630, 99316022,286133435,824112803,2373059251, 6832536414,19671776119,56638681010,163078362040, 469559902129,1352048562017,3893102975595, 11209833959312] |