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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 8 |
| 3 | 32 |
| 4 | 96 |
| 5 | 384 |
| 6 | 1280 |
| 7 | 5120 |
| 8 | 17920 |
| 9 | 71680 |
| 10 | 258048 |
| 11 | 1032192 |
| 12 | 3784704 |
| 13 | 15138816 |
| 14 | 56229888 |
| 15 | 224919552 |
| 16 | 843448320 |
| 17 | 3373793280 |
| 18 | 12745441280 |
| 19 | 50981765120 |
| 20 | 193730707456 |
| 21 | 774922829824 |
| 22 | 2958796259328 |
| 23 | 11835185037312 |
| 24 | 45368209309696 |
| 25 | 181472837238784 |
[1,4,8,32,96,384,1280,5120,17920,71680,258048, 1032192,3784704,15138816,56229888,224919552, 843448320,3373793280,12745441280,50981765120, 193730707456,774922829824,2958796259328, 11835185037312,45368209309696,181472837238784] |