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A140647 as a simple table
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 10 |
| 4 | 107 |
| 5 | 1346 |
| 6 | 19917 |
| 7 | 341986 |
| 8 | 6713975 |
| 9 | 148717762 |
| 10 | 3674435393 |
| 11 | 100284451730 |
| 12 | 2998366140915 |
| 13 | 97510068994690 |
| 14 | 3428106725444117 |
| 15 | 129590070259759042 |
| 16 | 5242767731544271343 |
| 17 | 226057515078414496898 |
| 18 | 10350122253780835777545 |
| 19 | 501543984793431059579122 |
[1,10,107,1346,19917,341986,6713975,148717762, 3674435393,100284451730,2998366140915, 97510068994690,3428106725444117, 129590070259759042,5242767731544271343, 226057515078414496898,10350122253780835777545, 501543984793431059579122] |