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| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 14652 |
| 3 | 376080 |
| 4 | 4717944 |
| 5 | 42247752 |
| 6 | 311654376 |
| 7 | 2030475048 |
| 8 | 12146472360 |
| 9 | 68316332712 |
| 10 | 366865702056 |
| 11 | 1900861968552 |
| 12 | 9573539690664 |
| 13 | 47121333848232 |
| 14 | 227582442154152 |
| 15 | 1081872982370472 |
| 16 | 5074283412646056 |
| 17 | 23526766452271272 |
| 18 | 107995434142918824 |
| 19 | 491414463894251688 |
| 20 | 2218905516729428136 |
[42,14652,376080,4717944,42247752,311654376, 2030475048,12146472360,68316332712,366865702056, 1900861968552,9573539690664,47121333848232, 227582442154152,1081872982370472,5074283412646056, 23526766452271272,107995434142918824, 491414463894251688,2218905516729428136] |