The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 84 |
| 5 | 168 |
| 6 | 24 |
| 7 | 120 |
| 8 | 360 |
| 9 | 4680 |
| 10 | 32760 |
| 11 | 65520 |
| 12 | 2031120 |
| 13 | 4062240 |
| 14 | 8124480 |
| 15 | 1031808960 |
| 16 | 2063617920 |
| 17 | 4127235840 |
| 18 | 8254471680 |
| 19 | 16508943360 |
| 20 | 33017886720 |
| 21 | 259983360 |
| 22 | 8386560 |
| 23 | 4193280 |
| 24 | 373201920 |
| 25 | 8583644160 |
| 26 | 25750932480 |
| 27 | 1980840960 |
| 28 | 282977280 |
| 29 | 1414886400 |
| 30 | 43861478400 |
[2,6,12,84,168,24,120,360,4680,32760,65520, 2031120,4062240,8124480,1031808960,2063617920, 4127235840,8254471680,16508943360,33017886720, 259983360,8386560,4193280,373201920,8583644160, 25750932480,1980840960,282977280,1414886400, 43861478400] |