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A254059 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 18 |
| 5 | 110 |
| 6 | 146 |
| 7 | 1902 |
| 8 | 17406 |
| 9 | 18138 |
| 10 | 1063554 |
| 11 | 1067358 |
| 12 | 613398 |
| 13 | 32007426 |
| 14 | 3207106806 |
| 15 | 19364306334 |
| 16 | 11692834638 |
| 17 | 7305794123622 |
| 18 | 49155004502022 |
| 19 | 1080060968010858 |
| 20 | 11832864774651042 |
| 21 | 21773239326463026 |
| 22 | 475223541375418782 |
| 23 | 83304240831298888014 |
[1,2,10,18,110,146,1902,17406,18138,1063554, 1067358,613398,32007426,3207106806,19364306334, 11692834638,7305794123622,49155004502022, 1080060968010858,11832864774651042, 21773239326463026,475223541375418782, 83304240831298888014] |