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 | 4 |
| 2 | 6 |
| 3 | 424 |
| 4 | 40204 |
| 5 | 48184 |
| 6 | 68386 |
| 7 | 4002004 |
| 8 | 4992994 |
| 9 | 6510156 |
| 10 | 6830386 |
| 11 | 400020004 |
| 12 | 424545424 |
| 13 | 40000200004 |
| 14 | 41162526114 |
| 15 | 42314341324 |
| 16 | 47678687674 |
| 17 | 4000002000004 |
| 18 | 4644626264464 |
| 19 | 6201427241026 |
| 20 | 6866949496686 |
| 21 | 400000020000004 |
| 22 | 669896222698966 |
| 23 | 40000000200000004 |