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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 5 |
| 6 | -26 |
| 7 | -75 |
| 8 | -430 |
| 9 | -1183 |
| 10 | -4249 |
| 11 | -10191 |
| 12 | -27443 |
| 13 | -42735 |
| 14 | -35715 |
| 15 | 341250 |
| 16 | 2073952 |
| 17 | 9886007 |
| 18 | 36365567 |
| 19 | 124484714 |
| 20 | 364966293 |
| 21 | 965150205 |
| 22 | 1958034669 |
| 23 | 2048555297 |
| 24 | -9110607428 |
| 25 | -76703557685 |
| 26 | -383500583452 |
| 27 | -1539890758482 |
| 28 | -5456784935108 |
| 29 | -17115737273816 |
[1,1,1,3,1,5,-26,-75,-430,-1183,-4249,-10191, -27443,-42735,-35715,341250,2073952,9886007, 36365567,124484714,364966293,965150205,1958034669, 2048555297,-9110607428,-76703557685,-383500583452, -1539890758482,-5456784935108,-17115737273816] |