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A048971 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 54 |
| 4 | 91 |
| 5 | 323 |
| 6 | 44360 |
| 7 | 48919 |
| 8 | 218972 |
| 9 | 534078 |
| 10 | 2699915 |
| 11 | 3355906 |
| 12 | 17233173 |
[1,14,54,91,323,44360,48919,218972,534078,2699915, 3355906,17233173] |