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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 8 |
| 6 | 12 |
| 7 | 21 |
| 8 | 34 |
| 9 | 59 |
| 10 | 93 |
| 11 | 150 |
| 12 | 242 |
| 13 | 377 |
| 14 | 595 |
| 15 | 922 |
| 16 | 1419 |
| 17 | 2171 |
| 18 | 3310 |
| 19 | 4988 |
| 20 | 7507 |
| 21 | 11218 |
| 22 | 16674 |
| 23 | 24676 |
| 24 | 36353 |
| 25 | 53295 |
| 26 | 77828 |
| 27 | 113209 |
| 28 | 163989 |
| 29 | 236736 |
| 30 | 340517 |
| 31 | 488108 |
| 32 | 697407 |
| 33 | 993350 |
| 34 | 1410455 |
| 35 | 1996968 |
| 36 | 2819280 |
| 37 | 3969260 |
| 38 | 5573541 |
| 39 | 7806141 |
| 40 | 10905640 |
| 41 | 15199138 |
| 42 | 21133212 |
[1,0,1,3,3,8,12,21,34,59,93,150,242,377,595,922, 1419,2171,3310,4988,7507,11218,16674,24676,36353, 53295,77828,113209,163989,236736,340517,488108, 697407,993350,1410455,1996968,2819280,3969260, 5573541,7806141,10905640,15199138,21133212] |