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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 16 |
| 6 | 30 |
| 7 | 68 |
| 8 | 140 |
| 9 | 308 |
| 10 | 664 |
| 11 | 1476 |
| 12 | 3248 |
| 13 | 7280 |
| 14 | 16286 |
| 15 | 36768 |
| 16 | 83160 |
| 17 | 189120 |
| 18 | 431046 |
| 19 | 986244 |
| 20 | 2261616 |
| 21 | 5200776 |
| 22 | 11984382 |
| 23 | 27676612 |
| 24 | 64031520 |
| 25 | 148406224 |
| 26 | 344500520 |
| 27 | 800902564 |
| 28 | 1864486560 |
| 29 | 4346071600 |
| 30 | 10142581552 |
| 31 | 23696518916 |
| 32 | 55420651440 |
| 33 | 129742921992 |
| 34 | 304014466080 |
| 35 | 712985901856 |
| 36 | 1673486122000 |
[3,2,4,7,16,30,68,140,308,664,1476,3248,7280, 16286,36768,83160,189120,431046,986244,2261616, 5200776,11984382,27676612,64031520,148406224, 344500520,800902564,1864486560,4346071600, 10142581552,23696518916,55420651440,129742921992, 304014466080,712985901856,1673486122000] |