The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 5640 |
| 4 | 1269684 |
| 5 | 295671198 |
| 6 | 93391009587 |
| 7 | 26971800950170 |
| 8 | 7621726574570613 |
| 9 | 2176852129116199068 |
| 10 | 621423541447699842468 |
| 11 | 177129811732376379317558 |
| 12 | 50496098726203776039975335 |
| 13 | 14395928063309130831417237704 |
| 14 | 4103904494029399087473676726278 |
[1,5640,1269684,295671198,93391009587, 26971800950170,7621726574570613, 2176852129116199068,621423541447699842468, 177129811732376379317558, 50496098726203776039975335, 14395928063309130831417237704, 4103904494029399087473676726278] |