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 | 30 |
| 4 | 126 |
| 5 | 510 |
| 6 | 543 |
| 7 | 783 |
| 8 | 903 |
| 9 | 2046 |
| 10 | 2093 |
| 11 | 3773 |
| 12 | 3903 |
| 13 | 7133 |
| 14 | 7743 |
| 15 | 8190 |
| 16 | 8223 |
| 17 | 8703 |
| 18 | 10087 |
| 19 | 12303 |
| 20 | 12543 |
| 21 | 14343 |
| 22 | 14463 |
| 23 | 15423 |
| 24 | 15903 |
| 25 | 16143 |
| 26 | 16263 |
| 27 | 20167 |
| 28 | 22687 |
| 29 | 27727 |
| 30 | 30247 |
| 31 | 30653 |
| 32 | 30783 |
| 33 | 32766 |
| 34 | 35629 |
| 35 | 40327 |
| 36 | 47509 |
| 37 | 47887 |
| 38 | 49133 |
| 39 | 50407 |
| 40 | 57533 |
| 41 | 60071 |
| 42 | 60487 |