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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 19 |
| 4 | 201 |
| 5 | 2902 |
| 6 | 44185 |
| 7 | 799899 |
| 8 | 16434817 |
| 9 | 381367036 |
| 10 | 9876541023 |
| 11 | 282458540465 |
| 12 | 8842413667417 |
| 13 | 300771807236682 |
| 14 | 11046255305795333 |
| 15 | 435659737878916201 |
| 16 | 18364758544492069665 |
| 17 | 824008854613343260616 |
| 18 | 39210261334551566850727 |
| 19 | 1972313422155189164329713 |
| 20 | 104567135734072022160160883 |
[2,19,201,2902,44185,799899,16434817,381367036, 9876541023,282458540465,8842413667417, 300771807236682,11046255305795333, 435659737878916201,18364758544492069665, 824008854613343260616,39210261334551566850727, 1972313422155189164329713, 104567135734072022160160883] |