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 | 210 |
| 2 | 2730 |
| 3 | 7980 |
| 4 | 71610 |
| 5 | 85470 |
| 6 | 106260 |
| 7 | 114114 |
| 8 | 234780 |
| 9 | 341880 |
| 10 | 420420 |
| 11 | 499590 |
| 12 | 1563660 |
| 13 | 1647030 |
| 14 | 1857240 |
| 15 | 2042040 |
| 16 | 3423420 |
| 17 | 3666390 |
| 18 | 6587490 |
| 19 | 7393470 |
| 20 | 8514660 |
| 21 | 9279270 |
| 22 | 12766110 |
| 23 | 13123110 |
| 24 | 17957940 |
| 25 | 18820830 |
| 26 | 23393370 |
| 27 | 23573550 |
| 28 | 29099070 |
| 29 | 29274630 |
| 30 | 29609580 |