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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 18 |
| 7 | 36 |
| 8 | 72 |
| 9 | 144 |
| 10 | 288 |
| 11 | 576 |
| 12 | 1152 |
| 13 | 2304 |
| 14 | 4610 |
| 15 | 9220 |
| 16 | 18440 |
| 17 | 36882 |
| 18 | 73764 |
| 19 | 147528 |
| 20 | 295056 |
| 21 | 590112 |
| 22 | 1180224 |
| 23 | 2360450 |
| 24 | 4720900 |
| 25 | 9441800 |
| 26 | 18883606 |
| 27 | 37767212 |
| 28 | 75534424 |
| 29 | 151068852 |
| 30 | 302137704 |
| 31 | 604275408 |
| 32 | 1208550818 |
| 33 | 2417101636 |
[0,0,1,2,4,9,18,36,72,144,288,576,1152,2304,4610, 9220,18440,36882,73764,147528,295056,590112, 1180224,2360450,4720900,9441800,18883606,37767212, 75534424,151068852,302137704,604275408,1208550818, 2417101636] |