The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 10 |
| 3 | 32 |
| 4 | 60 |
| 5 | 88 |
| 6 | 688 |
| 7 | 2544 |
| 8 | 3424 |
| 9 | 12200 |
| 10 | 62848 |
| 11 | 777984 |
| 12 | 1037824 |
| 13 | 16734208 |
| 14 | 67022848 |
| 15 | 8625555968 |
| 16 | 51537444864 |
| 17 | 1099500617728 |
[4,10,32,60,88,688,2544,3424,12200,62848,777984, 1037824,16734208,67022848,8625555968,51537444864, 1099500617728] |