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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 3 |
| 4 | 4 |
| 5 | 7 |
| 6 | 9 |
| 7 | 15 |
| 8 | 26 |
| 9 | 46 |
| 10 | 84 |
| 11 | 151 |
| 12 | 276 |
| 13 | 506 |
| 14 | 929 |
| 15 | 1708 |
| 16 | 3138 |
| 17 | 5770 |
| 18 | 10611 |
| 19 | 19515 |
| 20 | 35893 |
| 21 | 66014 |
| 22 | 121417 |
| 23 | 223319 |
| 24 | 410746 |
| 25 | 755479 |
| 26 | 1389539 |
| 27 | 2555759 |
| 28 | 4700772 |
| 29 | 8646066 |
| 30 | 15902594 |
| 31 | 29249427 |
| 32 | 53798082 |
| 33 | 98950098 |
| 34 | 181997603 |
| 35 | 334745780 |
| 36 | 615693476 |
[1,3,3,4,7,9,15,26,46,84,151,276,506,929,1708, 3138,5770,10611,19515,35893,66014,121417,223319, 410746,755479,1389539,2555759,4700772,8646066, 15902594,29249427,53798082,98950098,181997603, 334745780,615693476] |