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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 8 |
| 8 | 15 |
| 9 | 23 |
| 10 | 40 |
| 11 | 63 |
| 12 | 108 |
| 13 | 172 |
| 14 | 290 |
| 15 | 471 |
| 16 | 782 |
| 17 | 1280 |
| 18 | 2119 |
| 19 | 3474 |
| 20 | 5741 |
| 21 | 9432 |
| 22 | 15557 |
| 23 | 25590 |
| 24 | 42180 |
| 25 | 69413 |
| 26 | 114371 |
| 27 | 188276 |
| 28 | 310136 |
| 29 | 510637 |
| 30 | 841045 |
| 31 | 1384883 |
| 32 | 2280831 |
| 33 | 3755862 |
| 34 | 6185457 |
| 35 | 10185941 |
| 36 | 16774695 |
| 37 | 27624215 |
| 38 | 45492412 |
| 39 | 74916559 |
| 40 | 123374127 |
| 41 | 203172520 |
| 42 | 334587577 |
[1,0,1,1,2,3,6,8,15,23,40,63,108,172,290,471,782, 1280,2119,3474,5741,9432,15557,25590,42180,69413, 114371,188276,310136,510637,841045,1384883, 2280831,3755862,6185457,10185941,16774695, 27624215,45492412,74916559,123374127,203172520, 334587577] |