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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 5 |
| 5 | 98 |
| 6 | 1234 |
| 7 | 13255 |
| 8 | 129567 |
| 9 | 1219243 |
| 10 | 11287965 |
| 11 | 103578486 |
| 12 | 946685407 |
| 13 | 8643973155 |
| 14 | 78973715102 |
| 15 | 722623290887 |
| 16 | 6625617932534 |
| 17 | 60889631777778 |
| 18 | 560938901663498 |
[0,0,0,5,98,1234,13255,129567,1219243,11287965, 103578486,946685407,8643973155,78973715102, 722623290887,6625617932534,60889631777778, 560938901663498] |