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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 6 |
| 6 | 20 |
| 7 | 46 |
| 8 | 92 |
| 9 | 138 |
| 10 | 276 |
| 11 | 676 |
| 12 | 1476 |
| 13 | 3332 |
| 14 | 5670 |
| 15 | 11574 |
| 16 | 27262 |
| 17 | 61952 |
| 18 | 135354 |
| 19 | 222848 |
| 20 | 549226 |
| 21 | 1319282 |
| 22 | 3068894 |
| 23 | 6449978 |
| 24 | 10987080 |
| 25 | 27779594 |
| 26 | 67311236 |
| 27 | 157054012 |
| 28 | 313271538 |
| 29 | 579149708 |
| 30 | 1452091208 |
| 31 | 3548249288 |
| 32 | 7866783754 |
| 33 | 16098393372 |
| 34 | 32442930610 |
| 35 | 78084645030 |
| 36 | 180671169756 |
[1,1,2,4,6,6,20,46,92,138,276,676,1476,3332,5670, 11574,27262,61952,135354,222848,549226,1319282, 3068894,6449978,10987080,27779594,67311236, 157054012,313271538,579149708,1452091208, 3548249288,7866783754,16098393372,32442930610, 78084645030,180671169756] |