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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 14 |
| 6 | 26 |
| 7 | 50 |
| 8 | 95 |
| 9 | 180 |
| 10 | 343 |
| 11 | 652 |
| 12 | 1240 |
| 13 | 2359 |
| 14 | 4486 |
| 15 | 8532 |
| 16 | 16227 |
| 17 | 30862 |
| 18 | 58697 |
| 19 | 111636 |
| 20 | 212321 |
| 21 | 403814 |
| 22 | 768015 |
| 23 | 1460691 |
| 24 | 2778094 |
| 25 | 5283667 |
| 26 | 10049027 |
| 27 | 19112282 |
| 28 | 36349721 |
| 29 | 69133673 |
| 30 | 131485594 |
| 31 | 250072951 |
| 32 | 475614693 |
| 33 | 904573387 |
| 34 | 1720411555 |
| 35 | 3272057256 |
| 36 | 6223138101 |
| 37 | 11835809946 |
| 38 | 22510571803 |
| 39 | 42812941849 |
[1,1,2,4,7,14,26,50,95,180,343,652,1240,2359,4486, 8532,16227,30862,58697,111636,212321,403814, 768015,1460691,2778094,5283667,10049027,19112282, 36349721,69133673,131485594,250072951,475614693, 904573387,1720411555,3272057256,6223138101, 11835809946,22510571803,42812941849] |