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 | 6 |
| 2 | 73 |
| 3 | 483 |
| 4 | 4074 |
| 5 | 4473 |
| 6 | 4623 |
| 7 | 7993 |
| 8 | 42813 |
| 9 | 69855 |
| 10 | 253782 |
| 11 | 799993 |
| 12 | 7999993 |
| 13 | 46000023 |
| 14 | 426000213 |
| 15 | 4600000023 |
| 16 | 6718967838 |
| 17 | 42600000213 |
| 18 | 46000000023 |
| 19 | 79999999993 |
| 20 | 426000000213 |