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 | 271 |
| 2 | 7722 |
| 3 | 85639 |
| 4 | 564041 |
| 5 | 2663506 |
| 6 | 9976732 |
| 7 | 31499434 |
| 8 | 87205393 |
| 9 | 217519577 |
| 10 | 498458246 |
| 11 | 1064675833 |
| 12 | 2143185161 |
| 13 | 4101100212 |
| 14 | 7511389208 |
| 15 | 13241320196 |
| 16 | 22569031649 |
| 17 | 37334466803 |
| 18 | 60131772546 |
| 19 | 94551181659 |
| 20 | 145479371081 |