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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 14 |
| 5 | 25 |
| 6 | 56 |
| 7 | 97 |
| 8 | 198 |
| 9 | 354 |
| 10 | 672 |
| 11 | 1170 |
| 12 | 2207 |
| 13 | 3762 |
| 14 | 6786 |
| 15 | 11675 |
| 16 | 20524 |
| 17 | 34636 |
| 18 | 60258 |
| 19 | 100580 |
| 20 | 171894 |
| 21 | 285820 |
| 22 | 480497 |
| 23 | 791316 |
| 24 | 1321346 |
| 25 | 2156830 |
| 26 | 3557353 |
| 27 | 5783660 |
| 28 | 9452658 |
| 29 | 15250216 |
| 30 | 24771526 |
| 31 | 39713788 |
| 32 | 64011924 |
| 33 | 102199026 |
| 34 | 163583054 |
| 35 | 259745051 |
[1,1,3,6,14,25,56,97,198,354,672,1170,2207,3762, 6786,11675,20524,34636,60258,100580,171894,285820, 480497,791316,1321346,2156830,3557353,5783660, 9452658,15250216,24771526,39713788,64011924, 102199026,163583054,259745051] |