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 | 4 |
| 1 | 18 |
| 2 | 133 |
| 3 | 1197 |
| 4 | 11374 |
| 5 | 110487 |
| 6 | 1084605 |
| 7 | 10708555 |
| 8 | 106091745 |
| 9 | 1053422339 |
| 10 | 10475688327 |
| 11 | 104287176419 |
| 12 | 1039019056246 |
| 13 | 10358018863853 |
| 14 | 103307491450820 |
| 15 | 1030734020030318 |
| 16 | 10287026204717358 |
| 17 | 102692313540015924 |
| 18 | 1025351434864118026 |
| 19 | 10239531292310798956 |
| 20 | 102270102190290407386 |