The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 16 |
| 4 | 68 |
| 5 | 1208 |
| 6 | 1424 |
| 7 | 3056 |
| 8 | 3824 |
| 9 | 3928 |
| 10 | 20912 |
| 11 | 52174 |
| 12 | 63716 |
| 13 | 88708 |
| 14 | 123148 |
| 15 | 161872 |
| 16 | 582224 |
| 17 | 887566 |
| 18 | 17083292 |
| 19 | 18900412 |
| 20 | 34648888 |
| 21 | 39991684 |
| 22 | 44884912 |
| 23 | 51390736 |
| 24 | 103170448 |
| 25 | 107825236 |
| 26 | 132238514 |
| 27 | 279900272 |
| 28 | 686071244 |
| 29 | 769252508 |
| 30 | 3251623346 |
| 31 | 3358311986 |
| 32 | 3535011826 |
[4,8,16,68,1208,1424,3056,3824,3928,20912,52174, 63716,88708,123148,161872,582224,887566,17083292, 18900412,34648888,39991684,44884912,51390736, 103170448,107825236,132238514,279900272,686071244, 769252508,3251623346,3358311986,3535011826] |