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 | 1 |
| 2 | 6 |
| 3 | 21 |
| 4 | 56 |
| 5 | 127 |
| 6 | 258 |
| 7 | 483 |
| 8 | 848 |
| 9 | 1413 |
| 10 | 2254 |
| 11 | 3465 |
| 12 | 5160 |
| 13 | 7475 |
| 14 | 10570 |
| 15 | 14631 |
| 16 | 19872 |
| 17 | 26537 |
| 18 | 34902 |
| 19 | 45277 |
| 20 | 58008 |
| 21 | 73479 |
| 22 | 92114 |
| 23 | 114379 |
| 24 | 140784 |
| 25 | 171885 |
| 26 | 208286 |
| 27 | 250641 |
| 28 | 299656 |
| 29 | 356091 |
| 30 | 420762 |
| 31 | 494543 |
| 32 | 578368 |
| 33 | 673233 |