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 | 15 |
| 3 | 42 |
| 4 | 84 |
| 5 | 135 |
| 6 | 308 |
| 7 | 420 |
| 8 | 546 |
| 9 | 1428 |
| 10 | 1488 |
| 11 | 1890 |
| 12 | 2295 |
| 13 | 2660 |
| 14 | 3780 |
| 15 | 6210 |
| 16 | 7440 |
| 17 | 9424 |
| 18 | 12180 |
| 19 | 13392 |
| 20 | 18018 |
| 21 | 20832 |
| 22 | 24384 |
| 23 | 24570 |
| 24 | 43152 |
| 25 | 43400 |
| 26 | 64260 |
| 27 | 66960 |
| 28 | 77490 |
| 29 | 90090 |
| 30 | 98420 |
| 31 | 121920 |
| 32 | 127710 |
| 33 | 155610 |
| 34 | 200340 |
| 35 | 204600 |
| 36 | 227664 |
| 37 | 316992 |
| 38 | 348688 |
| 39 | 353400 |
| 40 | 461776 |
| 41 | 483210 |