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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 65 |
| 3 | 1025 |
| 4 | 16385 |
| 5 | 262145 |
| 6 | 4194305 |
| 7 | 67108865 |
| 8 | 1073741825 |
| 9 | 17179869185 |
| 10 | 274877906945 |
| 11 | 4398046511105 |
| 12 | 70368744177665 |
| 13 | 1125899906842625 |
| 14 | 18014398509481985 |
| 15 | 288230376151711745 |
| 16 | 4611686018427387905 |
| 17 | 73786976294838206465 |
| 18 | 1180591620717411303425 |
| 19 | 18889465931478580854785 |
| 20 | 302231454903657293676545 |
[5,65,1025,16385,262145,4194305,67108865, 1073741825,17179869185,274877906945,4398046511105, 70368744177665,1125899906842625,18014398509481985, 288230376151711745,4611686018427387905, 73786976294838206465,1180591620717411303425, 18889465931478580854785,302231454903657293676545] |