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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | -11 |
| 5 | 0 |
| 6 | 211 |
| 7 | 0 |
| 8 | -6551 |
| 9 | 0 |
| 10 | 303271 |
| 11 | 0 |
| 12 | -19665491 |
| 13 | 0 |
| 14 | 1704396331 |
| 15 | 0 |
| 16 | -190473830831 |
| 17 | 0 |
| 18 | 26684005437391 |
| 19 | 0 |
| 20 | -4581126864886571 |
| 21 | 0 |
| 22 | 946075012113714451 |
| 23 | 0 |
| 24 | -231406946026650896711 |
| 25 | 0 |
| 26 | 66164529094650835995511 |
| 27 | 0 |
| 28 | -21866924546405967976005251 |
[0,0,1,0,-11,0,211,0,-6551,0,303271,0,-19665491,0, 1704396331,0,-190473830831,0,26684005437391,0, -4581126864886571,0,946075012113714451,0, -231406946026650896711,0,66164529094650835995511, 0,-21866924546405967976005251] |