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| n | a(n) |
|---|---|
| 1 | 91 |
| 2 | 201159 |
| 3 | 15407765 |
| 4 | 295233841 |
| 5 | 2746367559 |
| 6 | 16448122691 |
| 7 | 73287987409 |
| 8 | 264133278045 |
| 9 | 811598515091 |
| 10 | 2202365761759 |
| 11 | 5410166901741 |
| 12 | 12249942682409 |
| 13 | 25914353312575 |
| 14 | 51755729480091 |
| 15 | 98389720844009 |
| 16 | 179211321358741 |
| 17 | 314429627203659 |
| 18 | 533744613620855 |
| 19 | 879807401606341 |
| 20 | 1412624924155809 |
[91,201159,15407765,295233841,2746367559, 16448122691,73287987409,264133278045,811598515091, 2202365761759,5410166901741,12249942682409, 25914353312575,51755729480091,98389720844009, 179211321358741,314429627203659,533744613620855, 879807401606341,1412624924155809] |