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 | 86 |
| 2 | 1915 |
| 3 | 18502 |
| 4 | 115716 |
| 5 | 568107 |
| 6 | 2392915 |
| 7 | 9064541 |
| 8 | 31777144 |
| 9 | 104876598 |
| 10 | 329032264 |
| 11 | 986501800 |
| 12 | 2835296957 |
| 13 | 7828424002 |
| 14 | 20803012406 |
| 15 | 53300631267 |
| 16 | 131909615889 |
| 17 | 315895583635 |
| 18 | 733342224413 |
| 19 | 1653158389976 |
| 20 | 3624784596348 |