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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 12 |
| 5 | 29 |
| 6 | 58 |
| 7 | 123 |
| 8 | 240 |
| 9 | 501 |
| 10 | 998 |
| 11 | 2023 |
| 12 | 4040 |
| 13 | 8137 |
| 14 | 16266 |
| 15 | 32671 |
| 16 | 65300 |
| 17 | 130837 |
| 18 | 261682 |
| 19 | 523827 |
| 20 | 1047592 |
| 21 | 2096237 |
| 22 | 4192366 |
| 23 | 8386671 |
| 24 | 16773312 |
| 25 | 33550545 |
| 26 | 67100882 |
| 27 | 134210007 |
| 28 | 268419484 |
| 29 | 536854941 |
| 30 | 1073709994 |
| 31 | 2147451819 |
[0,1,2,7,12,29,58,123,240,501,998,2023,4040,8137, 16266,32671,65300,130837,261682,523827,1047592, 2096237,4192366,8386671,16773312,33550545, 67100882,134210007,268419484,536854941,1073709994, 2147451819] |