The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 10 |
| 2 | 120 |
| 3 | 1330 |
| 4 | 14640 |
| 5 | 161050 |
| 6 | 1771560 |
| 7 | 19487170 |
| 8 | 214358880 |
| 9 | 2357947690 |
| 10 | 25937424600 |
| 11 | 285311670610 |
| 12 | 3138428376720 |
| 13 | 34522712143930 |
| 14 | 379749833583240 |
| 15 | 4177248169415650 |
| 16 | 45949729863572160 |
| 17 | 505447028499293770 |
[0,10,120,1330,14640,161050,1771560,19487170, 214358880,2357947690,25937424600,285311670610, 3138428376720,34522712143930,379749833583240, 4177248169415650,45949729863572160, 505447028499293770] |