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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 12 |
| 4 | 29 |
| 5 | 67 |
| 6 | 160 |
| 7 | 385 |
| 8 | 920 |
| 9 | 2191 |
| 10 | 5191 |
| 11 | 12228 |
| 12 | 28401 |
| 13 | 64826 |
| 14 | 143540 |
| 15 | 303171 |
| 16 | 588027 |
| 17 | 980723 |
| 18 | 1256693 |
| 19 | 1049406 |
| 20 | 449402 |
| 21 | 72968 |
| 22 | 2888 |
| 23 | 14 |
[1,2,5,12,29,67,160,385,920,2191,5191,12228,28401, 64826,143540,303171,588027,980723,1256693,1049406, 449402,72968,2888,14] |