The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 6 |
| 3 | 48 |
| 4 | 436 |
| 5 | 4855 |
| 6 | 67146 |
| 7 | 1120882 |
| 8 | 21913032 |
| 9 | 490328973 |
| 10 | 12345678910 |
| 11 | 345227121316 |
| 12 | 10610896401084 |
| 13 | 355457590375459 |
| 14 | 12887297856859986 |
| 15 | 502684312937210790 |
| 16 | 20988295479420645136 |
| 17 | 933876701895122362393 |
| 18 | 44111544001370512713990 |
| 19 | 2204350295349917301461848 |
[6,48,436,4855,67146,1120882,21913032,490328973, 12345678910,345227121316,10610896401084, 355457590375459,12887297856859986, 502684312937210790,20988295479420645136, 933876701895122362393,44111544001370512713990, 2204350295349917301461848] |