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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 28 |
| 5 | 62 |
| 6 | 117 |
| 7 | 242 |
| 8 | 451 |
| 9 | 912 |
| 10 | 1703 |
| 11 | 3418 |
| 12 | 6420 |
| 13 | 12854 |
| 14 | 24293 |
| 15 | 48602 |
| 16 | 92359 |
| 17 | 184736 |
| 18 | 352695 |
| 19 | 705410 |
| 20 | 1352055 |
| 21 | 2704132 |
| 22 | 5200275 |
| 23 | 10400574 |
| 24 | 20058273 |
| 25 | 40116572 |
| 26 | 77558731 |
| 27 | 155117490 |
| 28 | 300540164 |
| 29 | 601080358 |
| 30 | 1166803077 |
| 31 | 2333606186 |
[0,2,5,14,28,62,117,242,451,912,1703,3418,6420, 12854,24293,48602,92359,184736,352695,705410, 1352055,2704132,5200275,10400574,20058273, 40116572,77558731,155117490,300540164,601080358, 1166803077,2333606186] |