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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 8 |
| 7 | 18 |
| 8 | 38 |
| 9 | 76 |
| 10 | 147 |
| 11 | 277 |
| 12 | 509 |
| 13 | 924 |
| 14 | 1648 |
| 15 | 2912 |
| 16 | 5088 |
| 17 | 8823 |
| 18 | 15170 |
| 19 | 25935 |
| 20 | 44042 |
| 21 | 74427 |
| 22 | 125112 |
| 23 | 209411 |
| 24 | 348960 |
| 25 | 579326 |
| 26 | 958077 |
| 27 | 1579098 |
| 28 | 2593903 |
| 29 | 4247768 |
| 30 | 6935070 |
| 31 | 11290627 |
| 32 | 18330973 |
| 33 | 29684082 |
| 34 | 47946852 |
| 35 | 77258764 |
| 36 | 124198083 |
[0,0,0,1,3,8,18,38,76,147,277,509,924,1648,2912, 5088,8823,15170,25935,44042,74427,125112,209411, 348960,579326,958077,1579098,2593903,4247768, 6935070,11290627,18330973,29684082,47946852, 77258764,124198083] |