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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 4 |
| 5 | 4 |
| 6 | 377 |
| 7 | 1202 |
| 8 | 133211 |
| 9 | 1082357 |
| 10 | 3730351411 |
| 11 | 6203235575 |
| 12 | 28719995819965 |
| 13 | 2124563380903465 |
| 14 | 122827509141846335 |
| 15 | 42344667805954043 |
| 16 | 1305035883448960477 |
| 17 | 36723101348641621053659 |
| 18 | 384279850938174722635253 |
| 19 | 71260765129276904394438865 |
[0,0,0,0,4,4,377,1202,133211,1082357,3730351411, 6203235575,28719995819965,2124563380903465, 122827509141846335,42344667805954043, 1305035883448960477,36723101348641621053659, 384279850938174722635253, 71260765129276904394438865] |