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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 32 |
| 4 | 112 |
| 5 | 352 |
| 6 | 1024 |
| 7 | 2816 |
| 8 | 7424 |
| 9 | 18944 |
| 10 | 47104 |
| 11 | 114688 |
| 12 | 274432 |
| 13 | 647168 |
| 14 | 1507328 |
| 15 | 3473408 |
| 16 | 7929856 |
| 17 | 17956864 |
| 18 | 40370176 |
| 19 | 90177536 |
| 20 | 200278016 |
| 21 | 442499072 |
| 22 | 973078528 |
| 23 | 2130706432 |
| 24 | 4647288832 |
| 25 | 10099884032 |
| 26 | 21877489664 |
| 27 | 47244640256 |
[1,2,8,32,112,352,1024,2816,7424,18944,47104, 114688,274432,647168,1507328,3473408,7929856, 17956864,40370176,90177536,200278016,442499072, 973078528,2130706432,4647288832,10099884032, 21877489664,47244640256] |