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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 12 |
| 6 | 22 |
| 7 | 39 |
| 8 | 69 |
| 9 | 123 |
| 10 | 219 |
| 11 | 389 |
| 12 | 692 |
| 13 | 1231 |
| 14 | 2189 |
| 15 | 3893 |
| 16 | 6924 |
| 17 | 12314 |
| 18 | 21900 |
| 19 | 38949 |
| 20 | 69270 |
| 21 | 123195 |
| 22 | 219100 |
| 23 | 389665 |
| 24 | 693011 |
| 25 | 1232506 |
| 26 | 2191987 |
| 27 | 3898404 |
| 28 | 6933232 |
| 29 | 12330612 |
| 30 | 21929742 |
| 31 | 39001599 |
| 32 | 69363549 |
| 33 | 123361658 |
| 34 | 219396194 |
| 35 | 390191659 |
| 36 | 693947912 |
[1,1,2,4,7,12,22,39,69,123,219,389,692,1231,2189, 3893,6924,12314,21900,38949,69270,123195,219100, 389665,693011,1232506,2191987,3898404,6933232, 12330612,21929742,39001599,69363549,123361658, 219396194,390191659,693947912] |