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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 11 |
| 7 | 21 |
| 8 | 30 |
| 9 | 48 |
| 10 | 72 |
| 11 | 110 |
| 12 | 171 |
| 13 | 260 |
| 14 | 401 |
| 15 | 613 |
| 16 | 942 |
| 17 | 1445 |
| 18 | 2216 |
| 19 | 3401 |
| 20 | 5216 |
| 21 | 8004 |
| 22 | 12278 |
| 23 | 18837 |
| 24 | 28899 |
| 25 | 44335 |
| 26 | 68018 |
| 27 | 104349 |
| 28 | 160089 |
| 29 | 245601 |
| 30 | 376791 |
| 31 | 578057 |
| 32 | 886830 |
| 33 | 1360538 |
| 34 | 2087279 |
| 35 | 3202216 |
| 36 | 4912704 |
| 37 | 7536863 |
| 38 | 11562737 |
| 39 | 17739062 |
| 40 | 27214520 |
[0,2,3,6,10,11,21,30,48,72,110,171,260,401,613, 942,1445,2216,3401,5216,8004,12278,18837,28899, 44335,68018,104349,160089,245601,376791,578057, 886830,1360538,2087279,3202216,4912704,7536863, 11562737,17739062,27214520] |