This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1729 |
| 2 | 4033 |
| 3 | 8321 |
| 4 | 12801 |
| 5 | 65281 |
| 6 | 130561 |
| 7 | 348161 |
| 8 | 3225601 |
| 9 | 8355841 |
| 10 | 8384513 |
| 11 | 16773121 |
| 12 | 40280065 |
| 13 | 104988673 |
| 14 | 2147418113 |
| 15 | 4294901761 |
| 16 | 4294967297 |
| 17 | 53282340865 |
| 18 | 68719214593 |
| 19 | 137439477761 |
| 20 | 1099510579201 |
| 21 | 1911029760001 |
| 22 | 2199021158401 |
| 23 | 8796097216513 |
| 24 | 281474959933441 |
| 25 | 9007199388958721 |
| 26 | 576460753377165313 |
| 27 | 2305843011361177601 |
| 28 | 18446744073709551617 |