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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 19 |
| 4 | 61 |
| 5 | 176 |
| 6 | 474 |
| 7 | 1219 |
| 8 | 3035 |
| 9 | 7378 |
| 10 | 17608 |
| 11 | 41405 |
| 12 | 96177 |
| 13 | 221092 |
| 14 | 503702 |
| 15 | 1138567 |
| 16 | 2555767 |
| 17 | 5701478 |
| 18 | 12648276 |
| 19 | 27918145 |
| 20 | 61341485 |
| 21 | 134217496 |
| 22 | 292552450 |
| 23 | 635436779 |
| 24 | 1375731411 |
| 25 | 2969566906 |
| 26 | 6392118944 |
| 27 | 13723762309 |
| 28 | 29393682025 |
| 29 | 62813896268 |
| 30 | 133949292078 |
| 31 | 285078453775 |
| 32 | 605590388207 |
[0,1,5,19,61,176,474,1219,3035,7378,17608,41405, 96177,221092,503702,1138567,2555767,5701478, 12648276,27918145,61341485,134217496,292552450, 635436779,1375731411,2969566906,6392118944, 13723762309,29393682025,62813896268,133949292078, 285078453775,605590388207] |