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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 6 |
| 2 | 128 |
| 3 | 2220 |
| 4 | 32112 |
| 5 | 421004 |
| 6 | 5209896 |
| 7 | 62098788 |
| 8 | 720987680 |
| 9 | 8209876572 |
| 10 | 92098765464 |
| 11 | 1020987654356 |
| 12 | 11209876543248 |
| 13 | 122098765432140 |
| 14 | 1320987654321032 |
| 15 | 14209876543209924 |
| 16 | 152098765432098816 |
| 17 | 1620987654320987708 |
| 18 | 17209876543209876600 |
| 19 | 182098765432098765492 |
[0,6,128,2220,32112,421004,5209896,62098788, 720987680,8209876572,92098765464,1020987654356, 11209876543248,122098765432140,1320987654321032, 14209876543209924,152098765432098816, 1620987654320987708,17209876543209876600, 182098765432098765492] |