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 | 3 |
| 2 | 43 |
| 3 | 849 |
| 4 | 19371 |
| 5 | 480503 |
| 6 | 12587065 |
| 7 | 342634365 |
| 8 | 9596641195 |
| 9 | 274766987955 |
| 10 | 8005895472543 |
| 11 | 236615835243329 |
| 12 | 7076435929811769 |
| 13 | 213755697648537567 |
| 14 | 6512143129366530853 |
| 15 | 199862758637494411349 |
| 16 | 6173557491107989995435 |
| 17 | 191779157650960532459435 |
| 18 | 5987596175475052883532955 |