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| n | a(n) |
|---|---|
| 1 | 1648 |
| 2 | 21635 |
| 3 | 210190 |
| 4 | 1605552 |
| 5 | 10500903 |
| 6 | 59962757 |
| 7 | 309154358 |
| 8 | 1459797487 |
| 9 | 6416948063 |
| 10 | 26519347624 |
| 11 | 104007127796 |
| 12 | 389733297547 |
| 13 | 1403705680053 |
| 14 | 4882521376349 |
| 15 | 16468445276261 |
| 16 | 54047747618910 |
| 17 | 173099841345451 |
[1648,21635,210190,1605552,10500903,59962757, 309154358,1459797487,6416948063,26519347624, 104007127796,389733297547,1403705680053, 4882521376349,16468445276261,54047747618910, 173099841345451] |