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 | 3 |
| 2 | 9 |
| 3 | 28 |
| 4 | 66 |
| 5 | 126 |
| 6 | 226 |
| 7 | 396 |
| 8 | 651 |
| 9 | 1001 |
| 10 | 1491 |
| 11 | 2184 |
| 12 | 3108 |
| 13 | 4284 |
| 14 | 5796 |
| 15 | 7752 |
| 16 | 10197 |
| 17 | 13167 |
| 18 | 16797 |
| 19 | 21252 |
| 20 | 26598 |
| 21 | 32890 |
| 22 | 40326 |
| 23 | 49140 |
| 24 | 59423 |
| 25 | 71253 |
| 26 | 84903 |
| 27 | 100688 |
| 28 | 118728 |
| 29 | 139128 |
| 30 | 162248 |
| 31 | 188496 |
| 32 | 218025 |
| 33 | 250971 |
| 34 | 287793 |
| 35 | 329004 |
| 36 | 374794 |
| 37 | 425334 |
| 38 | 481194 |
| 39 | 543004 |