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| n | a(n) |
|---|---|
| 1 | 1265 |
| 2 | 3084 |
| 3 | 10585 |
| 4 | 24336 |
| 5 | 104515 |
| 6 | 386004 |
| 7 | 902276 |
| 8 | 3886119 |
| 9 | 14439854 |
| 10 | 33740636 |
| 11 | 145226515 |
| 12 | 541433298 |
| 13 | 1264809720 |
| 14 | 5437258963 |
| 15 | 20326627042 |
| 16 | 47472999320 |
| 17 | 203838402331 |
| 18 | 764011813890 |
| 19 | 1783974607832 |
| 20 | 7651263017251 |
| 21 | 28749096631362 |
[1265,3084,10585,24336,104515,386004,902276, 3886119,14439854,33740636,145226515,541433298, 1264809720,5437258963,20326627042,47472999320, 203838402331,764011813890,1783974607832, 7651263017251,28749096631362] |