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| n | a(n) |
|---|---|
| 0 | -2 |
| 1 | -1 |
| 2 | -3 |
| 3 | -11 |
| 4 | -13 |
| 5 | 971 |
| 6 | 31469 |
| 7 | 856073 |
| 8 | 23576391 |
| 9 | 686321335 |
| 10 | 21381059609 |
| 11 | 714688329389 |
| 12 | 25606611695675 |
| 13 | 981043357956611 |
| 14 | 40073886188532741 |
| 15 | 1740059447428511761 |
| 16 | 80079381261983807759 |
| 17 | 3895126220983308449519 |
| 18 | 199726027609854787271729 |
[-2,-1,-3,-11,-13,971,31469,856073,23576391, 686321335,21381059609,714688329389,25606611695675, 981043357956611,40073886188532741, 1740059447428511761,80079381261983807759, 3895126220983308449519,199726027609854787271729] |