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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 18 |
| 7 | 35 |
| 8 | 65 |
| 9 | 119 |
| 10 | 221 |
| 11 | 412 |
| 12 | 764 |
| 13 | 1416 |
| 14 | 2629 |
| 15 | 4881 |
| 16 | 9057 |
| 17 | 16807 |
| 18 | 31194 |
| 19 | 57894 |
| 20 | 107442 |
| 21 | 199399 |
| 22 | 370065 |
| 23 | 686799 |
| 24 | 1274617 |
| 25 | 2365544 |
| 26 | 4390184 |
| 27 | 8147680 |
| 28 | 15121161 |
| 29 | 28063153 |
| 30 | 52082017 |
| 31 | 96658283 |
| 32 | 179386750 |
| 33 | 332921362 |
| 34 | 617864098 |
[1,1,1,3,6,10,18,35,65,119,221,412,764,1416,2629, 4881,9057,16807,31194,57894,107442,199399,370065, 686799,1274617,2365544,4390184,8147680,15121161, 28063153,52082017,96658283,179386750,332921362, 617864098] |