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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | -4 |
| 4 | -154 |
| 5 | 1336 |
| 6 | 139402 |
| 7 | -2516812 |
| 8 | -531298962 |
| 9 | 16291452784 |
| 10 | 5792759106578 |
| 11 | -269619415772564 |
| 12 | -144868583759257994 |
| 13 | 9514326895639572136 |
| 14 | 7196653593954009006746 |
| 15 | -633707576374342516652764 |
| 16 | -641861736344903371972973954 |
| 17 | 72970336686693711886017561312 |
| 18 | 95350631737851404765088770262050 |
| 19 | -13593601759174079774108596113815332 |
| 20 | -22265118012504823914985759717325911674 |
[2,-4,-154,1336,139402,-2516812,-531298962, 16291452784,5792759106578,-269619415772564, -144868583759257994,9514326895639572136, 7196653593954009006746,-633707576374342516652764, -641861736344903371972973954, 72970336686693711886017561312, 95350631737851404765088770262050, -13593601759174079774108596113815332, -22265118012504823914985759717325911674] |