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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 7 |
| 7 | 12 |
| 8 | 22 |
| 9 | 42 |
| 10 | 81 |
| 11 | 157 |
| 12 | 307 |
| 13 | 606 |
| 14 | 1206 |
| 15 | 2416 |
| 16 | 4865 |
| 17 | 9839 |
| 18 | 19981 |
| 19 | 40737 |
| 20 | 83343 |
| 21 | 171028 |
| 22 | 351940 |
| 23 | 726099 |
| 24 | 1501642 |
| 25 | 3112400 |
| 26 | 6464125 |
| 27 | 13450825 |
| 28 | 28038767 |
| 29 | 58544953 |
| 30 | 122431896 |
| 31 | 256408712 |
| 32 | 537732762 |
| 33 | 1129175346 |
| 34 | 2374028444 |
| 35 | 4997020292 |
| 36 | 10529562040 |
| 37 | 22210529816 |
| 38 | 46895830078 |
| 39 | 99109479009 |
[1,1,1,2,4,7,12,22,42,81,157,307,606,1206,2416, 4865,9839,19981,40737,83343,171028,351940,726099, 1501642,3112400,6464125,13450825,28038767, 58544953,122431896,256408712,537732762,1129175346, 2374028444,4997020292,10529562040,22210529816, 46895830078,99109479009] |