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 | 21 |
| 1 | 22 |
| 2 | 43 |
| 3 | 65 |
| 4 | 693 |
| 5 | 4223 |
| 6 | 42923 |
| 7 | 47146 |
| 8 | 90069 |
| 9 | 137215 |
| 10 | 5853099 |
| 11 | 5990314 |
| 12 | 11843413 |
| 13 | 17833727 |
| 14 | 190180683 |
| 15 | 1158917825 |
| 16 | 11779358933 |
| 17 | 12938276758 |
| 18 | 24717635691 |
| 19 | 37655912449 |
| 20 | 1606265958549 |
| 21 | 1643921870998 |
| 22 | 3250187829547 |
| 23 | 4894109700545 |
| 24 | 52191284834997 |