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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 64 |
| 4 | 1024 |
| 5 | 262144 |
| 6 | 4194304 |
| 7 | 1073741824 |
| 8 | 17179869184 |
| 9 | 4398046511104 |
| 10 | 18014398509481984 |
| 11 | 288230376151711744 |
| 12 | 1180591620717411303424 |
| 13 | 302231454903657293676544 |
| 14 | 4835703278458516698824704 |
[1,4,64,1024,262144,4194304,1073741824, 17179869184,4398046511104,18014398509481984, 288230376151711744,1180591620717411303424, 302231454903657293676544, 4835703278458516698824704] |