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) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 727 |
| 3 | 84479 |
| 4 | 9935791 |
| 5 | 1204757533 |
| 6 | 141186107223 |
| 7 | 16785795917908 |
| 8 | 1990875917805852 |
| 9 | 235938457227641114 |
| 10 | 27983642750014402471 |
| 11 | 3317789294005871444981 |
| 12 | 393402890773982287366724 |
| 13 | 46647231741875687157655718 |
| 14 | 5531042470843072944881265311 |
| 15 | 655831959035571795593459804091 |