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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 91 |
| 3 | 4420 |
| 4 | 116624 |
| 5 | 2993934 |
| 6 | 71707838 |
| 7 | 1644385909 |
| 8 | 36631580212 |
| 9 | 797807876394 |
| 10 | 17071093013959 |
| 11 | 360093050350939 |
| 12 | 7506214481935722 |
| 13 | 154911588816764077 |
| 14 | 3169754325029230295 |
| 15 | 64378159448861378436 |
| 16 | 1299032728948862185980 |
[0,91,4420,116624,2993934,71707838,1644385909, 36631580212,797807876394,17071093013959, 360093050350939,7506214481935722, 154911588816764077,3169754325029230295, 64378159448861378436,1299032728948862185980] |