The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 1764 |
| 3 | 12994 |
| 4 | 101233 |
| 5 | 644401 |
| 6 | 3205650 |
| 7 | 16675001 |
| 8 | 76629370 |
| 9 | 345252578 |
| 10 | 1534975920 |
| 11 | 6569471819 |
| 12 | 28198798691 |
| 13 | 119211939368 |
| 14 | 501052508853 |
| 15 | 2103730122314 |
| 16 | 8781162264514 |
| 17 | 36654035342450 |
| 18 | 152721010610871 |
[42,1764,12994,101233,644401,3205650,16675001, 76629370,345252578,1534975920,6569471819, 28198798691,119211939368,501052508853, 2103730122314,8781162264514,36654035342450, 152721010610871] |