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A215784 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 12 |
| 4 | 29 |
| 5 | 189 |
| 6 | 458 |
| 7 | 2988 |
| 8 | 7241 |
| 9 | 47241 |
| 10 | 114482 |
| 11 | 746892 |
| 12 | 1809989 |
| 13 | 11808549 |
| 14 | 28616378 |
| 15 | 186696108 |
| 16 | 452432081 |
| 17 | 2951712081 |
| 18 | 7153064162 |
| 19 | 46667304972 |
| 20 | 113091730349 |
| 21 | 737821743309 |
| 22 | 1788008493098 |
| 23 | 11665145978028 |
| 24 | 28268860698521 |
[1,2,12,29,189,458,2988,7241,47241,114482,746892, 1809989,11808549,28616378,186696108,452432081, 2951712081,7153064162,46667304972,113091730349, 737821743309,1788008493098,11665145978028, 28268860698521] |