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 | 0 |
| 2 | 20 |
| 3 | 84 |
| 4 | 90 |
| 5 | 180 |
| 6 | 252 |
| 7 | 273 |
| 8 | 455 |
| 9 | 510 |
| 10 | 738 |
| 11 | 756 |
| 12 | 810 |
| 13 | 816 |
| 14 | 840 |
| 15 | 900 |
| 16 | 1224 |
| 17 | 1275 |
| 18 | 1460 |
| 19 | 1470 |
| 20 | 1620 |
| 21 | 1640 |
| 22 | 2090 |
| 23 | 2185 |
| 24 | 2268 |
| 25 | 2450 |
| 26 | 2541 |
| 27 | 3080 |
| 28 | 3289 |
| 29 | 3553 |
| 30 | 4199 |
| 31 | 4590 |
| 32 | 5434 |
| 33 | 6570 |
| 34 | 6642 |
| 35 | 6660 |
| 36 | 6804 |
| 37 | 7290 |
| 38 | 7326 |
| 39 | 7344 |
| 40 | 7380 |
| 41 | 7395 |
| 42 | 7470 |
| 43 | 7560 |
| 44 | 7866 |
| 45 | 8100 |
| 46 | 8160 |
| 47 | 8190 |
| 48 | 8778 |
| 49 | 8841 |
| 50 | 8925 |
| 51 | 9282 |