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| n | a(n) |
|---|---|
| 0 | -4 |
| 1 | 168 |
| 2 | 512 |
| 3 | 1200 |
| 4 | 2576 |
| 5 | 5328 |
| 6 | 10832 |
| 7 | 21840 |
| 8 | 43856 |
| 9 | 87888 |
| 10 | 175952 |
| 11 | 352080 |
| 12 | 704336 |
| 13 | 1408848 |
| 14 | 2817872 |
| 15 | 5635920 |
| 16 | 11272016 |
| 17 | 22544208 |
| 18 | 45088592 |
| 19 | 90177360 |
| 20 | 180354896 |
| 21 | 360709968 |
| 22 | 721420112 |
| 23 | 1442840400 |
| 24 | 2885680976 |
| 25 | 5771362128 |
| 26 | 11542724432 |
| 27 | 23085449040 |
| 28 | 46170898256 |
| 29 | 92341796688 |
| 30 | 184683593552 |
[-4,168,512,1200,2576,5328,10832,21840,43856, 87888,175952,352080,704336,1408848,2817872, 5635920,11272016,22544208,45088592,90177360, 180354896,360709968,721420112,1442840400, 2885680976,5771362128,11542724432,23085449040, 46170898256,92341796688,184683593552] |