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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 15 |
| 5 | 35 |
| 6 | 76 |
| 7 | 156 |
| 8 | 310 |
| 9 | 590 |
| 10 | 1098 |
| 11 | 1984 |
| 12 | 3515 |
| 13 | 6094 |
| 14 | 10398 |
| 15 | 17434 |
| 16 | 28837 |
| 17 | 47038 |
| 18 | 75820 |
| 19 | 120794 |
| 20 | 190479 |
| 21 | 297365 |
| 22 | 460056 |
| 23 | 705576 |
| 24 | 1073473 |
| 25 | 1620680 |
| 26 | 2429352 |
| 27 | 3616580 |
| 28 | 5349359 |
| 29 | 7863564 |
| 30 | 11491946 |
| 31 | 16700534 |
| 32 | 24140606 |
| 33 | 34716813 |
| 34 | 49682700 |
| 35 | 70766326 |
| 36 | 100343410 |
[1,1,2,6,15,35,76,156,310,590,1098,1984,3515,6094, 10398,17434,28837,47038,75820,120794,190479, 297365,460056,705576,1073473,1620680,2429352, 3616580,5349359,7863564,11491946,16700534, 24140606,34716813,49682700,70766326,100343410] |