The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 123 |
| 3 | 2445 |
| 4 | 16173 |
| 5 | 134123 |
| 6 | 1995817 |
| 7 | 25184119 |
| 8 | 253060180 |
| 9 | 2699712781 |
| 10 | 31854290493 |
| 11 | 365376809383 |
| 12 | 4016844547274 |
| 13 | 44697066555161 |
| 14 | 506502839719527 |
| 15 | 5708954680478155 |
| 16 | 63850099140551870 |
| 17 | 715789920989332820 |
[1,123,2445,16173,134123,1995817,25184119, 253060180,2699712781,31854290493,365376809383, 4016844547274,44697066555161,506502839719527, 5708954680478155,63850099140551870, 715789920989332820] |