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) |
|---|---|
| 3 | 308 |
| 4 | 3030 |
| 5 | 29757 |
| 6 | 294327 |
| 7 | 2911142 |
| 8 | 28814940 |
| 9 | 285214743 |
| 10 | 2823311133 |
| 11 | 27947663768 |
| 12 | 276653115090 |
| 13 | 2738581182417 |
| 14 | 27109156615827 |
| 15 | 268352962161482 |
| 16 | 2656420444277880 |
| 17 | 26295851254778283 |
| 18 | 260302091898387033 |
| 19 | 2576725065493516028 |
| 20 | 25506948561006315150 |