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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 36 |
| 4 | 512 |
| 5 | 10000 |
| 6 | 248832 |
| 7 | 7529536 |
| 8 | 268435456 |
| 9 | 11019960576 |
| 10 | 512000000000 |
| 11 | 26559922791424 |
| 12 | 1521681143169024 |
| 13 | 95428956661682176 |
| 14 | 6502111422497947648 |
| 15 | 478296900000000000000 |
| 16 | 37778931862957161709568 |
| 17 | 3189059870763703892770816 |
| 18 | 286511799958070431838109696 |
[0,1,4,36,512,10000,248832,7529536,268435456, 11019960576,512000000000,26559922791424, 1521681143169024,95428956661682176, 6502111422497947648,478296900000000000000, 37778931862957161709568,3189059870763703892770816, 286511799958070431838109696] |