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| n | a(n) |
|---|---|
| -1 | 0 |
| 0 | 16 |
| 1 | 64 |
| 2 | 192 |
| 3 | 512 |
| 4 | 1280 |
| 5 | 3072 |
| 6 | 7168 |
| 7 | 16384 |
| 8 | 36864 |
| 9 | 81920 |
| 10 | 180224 |
| 11 | 393216 |
| 12 | 851968 |
| 13 | 1835008 |
| 14 | 3932160 |
| 15 | 8388608 |
| 16 | 17825792 |
| 17 | 37748736 |
| 18 | 79691776 |
| 19 | 167772160 |
| 20 | 352321536 |
| 21 | 738197504 |
| 22 | 1543503872 |
| 23 | 3221225472 |
| 24 | 6710886400 |
| 25 | 13958643712 |
[0,16,64,192,512,1280,3072,7168,16384,36864,81920, 180224,393216,851968,1835008,3932160,8388608, 17825792,37748736,79691776,167772160,352321536, 738197504,1543503872,3221225472,6710886400, 13958643712] |