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| n | a(n) |
|---|---|
| 1 | -2 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 4 |
| 6 | 13 |
| 7 | 16 |
| 8 | 44 |
| 9 | 52 |
| 10 | 112 |
| 11 | 182 |
| 12 | 411 |
| 13 | 620 |
| 14 | 1318 |
| 15 | 2142 |
| 16 | 5148 |
| 17 | 7676 |
| 18 | 15228 |
| 19 | 27530 |
| 20 | 58660 |
| 21 | 98372 |
| 22 | 207392 |
| 23 | 364464 |
| 24 | 763263 |
| 25 | 1341508 |
| 26 | 2773990 |
| 27 | 4923220 |
| 28 | 10470948 |
| 29 | 18510902 |
| 30 | 37546152 |
| 31 | 69269976 |
| 32 | 148419094 |
| 33 | 258284232 |
| 34 | 534761242 |
| 35 | 981480012 |
| 36 | 2004302204 |
[-2,1,1,4,4,13,16,44,52,112,182,411,620,1318,2142, 5148,7676,15228,27530,58660,98372,207392,364464, 763263,1341508,2773990,4923220,10470948,18510902, 37546152,69269976,148419094,258284232,534761242, 981480012,2004302204] |