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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 28 |
| 4 | 71 |
| 5 | 162 |
| 6 | 349 |
| 7 | 728 |
| 8 | 1491 |
| 9 | 3022 |
| 10 | 6089 |
| 11 | 12228 |
| 12 | 24511 |
| 13 | 49082 |
| 14 | 98229 |
| 15 | 196528 |
| 16 | 393131 |
| 17 | 786342 |
| 18 | 1572769 |
| 19 | 3145628 |
| 20 | 6291351 |
| 21 | 12582802 |
| 22 | 25165709 |
| 23 | 50331528 |
| 24 | 100663171 |
| 25 | 201326462 |
| 26 | 402653049 |
| 27 | 805306228 |
| 28 | 1610612591 |
| 29 | 3221225322 |
[1,2,9,28,71,162,349,728,1491,3022,6089,12228, 24511,49082,98229,196528,393131,786342,1572769, 3145628,6291351,12582802,25165709,50331528, 100663171,201326462,402653049,805306228, 1610612591,3221225322] |