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 | 2 |
| 3 | 7 |
| 4 | 9 |
| 5 | 52 |
| 6 | 61 |
| 7 | 235 |
| 8 | 296 |
| 9 | 531 |
| 10 | 6668 |
| 11 | 7199 |
| 12 | 13867 |
| 13 | 48800 |
| 14 | 62667 |
| 15 | 362135 |
| 16 | 424802 |
| 17 | 1636541 |
| 18 | 2061343 |
| 19 | 3697884 |
| 20 | 46435951 |
| 21 | 50133835 |
| 22 | 96569786 |
| 23 | 339843193 |
| 24 | 436412979 |
| 25 | 2521908088 |
| 26 | 2958321067 |
| 27 | 11396871289 |
| 28 | 14355192356 |
| 29 | 25752063645 |
| 30 | 323379956096 |
| 31 | 349132019741 |