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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 56 |
| 7 | 104 |
| 8 | 196 |
| 9 | 370 |
| 10 | 702 |
| 11 | 1334 |
| 12 | 2540 |
| 13 | 4846 |
| 14 | 9268 |
| 15 | 17760 |
| 16 | 34108 |
| 17 | 65630 |
| 18 | 126514 |
| 19 | 244308 |
| 20 | 472550 |
| 21 | 915434 |
| 22 | 1776014 |
| 23 | 3450332 |
| 24 | 6711776 |
| 25 | 13072040 |
| 26 | 25488502 |
| 27 | 49752046 |
| 28 | 97210864 |
| 29 | 190120170 |
| 30 | 372157144 |
| 31 | 729097320 |
| 32 | 1429497148 |
| 33 | 2804782866 |
[1,2,4,8,16,30,56,104,196,370,702,1334,2540,4846, 9268,17760,34108,65630,126514,244308,472550, 915434,1776014,3450332,6711776,13072040,25488502, 49752046,97210864,190120170,372157144,729097320, 1429497148,2804782866] |