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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 2 |
| 7 | 7 |
| 8 | 12 |
| 9 | 10 |
| 10 | 19 |
| 11 | 41 |
| 12 | 61 |
| 13 | 76 |
| 14 | 135 |
| 15 | 240 |
| 16 | 356 |
| 17 | 521 |
| 18 | 879 |
| 19 | 1445 |
| 20 | 2198 |
| 21 | 3407 |
| 22 | 5568 |
| 23 | 8898 |
| 24 | 13811 |
| 25 | 21797 |
| 26 | 35017 |
| 27 | 55488 |
| 28 | 87111 |
| 29 | 138100 |
| 30 | 220028 |
| 31 | 348081 |
| 32 | 549427 |
| 33 | 871433 |
| 34 | 1383370 |
| 35 | 2188903 |
| 36 | 3463028 |
| 37 | 5490410 |
| 38 | 8703187 |
| 39 | 13777281 |
| 40 | 21815941 |
[1,0,0,1,3,1,2,7,12,10,19,41,61,76,135,240,356, 521,879,1445,2198,3407,5568,8898,13811,21797, 35017,55488,87111,138100,220028,348081,549427, 871433,1383370,2188903,3463028,5490410,8703187, 13777281,21815941] |