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 | 1 |
| 2 | 43 |
| 3 | 547 |
| 4 | 3277 |
| 5 | 13021 |
| 6 | 39991 |
| 7 | 102943 |
| 8 | 233017 |
| 9 | 478297 |
| 10 | 909091 |
| 11 | 1623931 |
| 12 | 2756293 |
| 13 | 4482037 |
| 14 | 7027567 |
| 15 | 10678711 |
| 16 | 15790321 |
| 17 | 22796593 |
| 18 | 32222107 |
| 19 | 44693587 |
| 20 | 60952381 |
| 21 | 81867661 |
| 22 | 108450343 |
| 23 | 141867727 |
| 24 | 183458857 |
| 25 | 234750601 |
| 26 | 297474451 |
| 27 | 373584043 |
| 28 | 465273397 |
| 29 | 574995877 |