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 | 3 |
| 2 | 9 |
| 3 | 18 |
| 4 | 24 |
| 5 | 48 |
| 6 | 69 |
| 7 | 93 |
| 8 | 102 |
| 9 | 108 |
| 10 | 144 |
| 11 | 168 |
| 12 | 177 |
| 13 | 213 |
| 14 | 249 |
| 15 | 258 |
| 16 | 273 |
| 17 | 282 |
| 18 | 324 |
| 19 | 357 |
| 20 | 363 |
| 21 | 387 |
| 22 | 399 |
| 23 | 438 |
| 24 | 444 |
| 25 | 504 |
| 26 | 507 |
| 27 | 573 |
| 28 | 609 |
| 29 | 669 |
| 30 | 678 |
| 31 | 738 |
| 32 | 759 |
| 33 | 762 |
| 34 | 777 |
| 35 | 807 |
| 36 | 864 |
| 37 | 867 |
| 38 | 909 |
| 39 | 942 |
| 40 | 948 |
| 41 | 963 |
| 42 | 1014 |
| 43 | 1068 |
| 44 | 1074 |
| 45 | 1182 |
| 46 | 1197 |
| 47 | 1248 |
| 48 | 1299 |
| 49 | 1389 |
| 50 | 1392 |
| 51 | 1413 |
| 52 | 1488 |