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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 17 |
| 5 | 38 |
| 6 | 86 |
| 7 | 192 |
| 8 | 420 |
| 9 | 905 |
| 10 | 1939 |
| 11 | 4163 |
| 12 | 8987 |
| 13 | 19494 |
| 14 | 42368 |
| 15 | 91990 |
| 16 | 199127 |
| 17 | 429345 |
| 18 | 921982 |
| 19 | 1972553 |
| 20 | 4206909 |
| 21 | 8949412 |
| 22 | 19001874 |
| 23 | 40293048 |
| 24 | 85373962 |
| 25 | 180826115 |
| 26 | 382957231 |
| 27 | 811027414 |
| 28 | 1717497958 |
| 29 | 3636335170 |
| 30 | 7695599294 |
| 31 | 16275268520 |
| 32 | 34389570596 |
[1,2,4,8,17,38,86,192,420,905,1939,4163,8987, 19494,42368,91990,199127,429345,921982,1972553, 4206909,8949412,19001874,40293048,85373962, 180826115,382957231,811027414,1717497958, 3636335170,7695599294,16275268520,34389570596] |