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 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 10 |
| 5 | 12 |
| 6 | 18 |
| 7 | 20 |
| 8 | 24 |
| 9 | 30 |
| 10 | 42 |
| 11 | 60 |
| 12 | 84 |
| 13 | 120 |
| 14 | 140 |
| 15 | 168 |
| 16 | 180 |
| 17 | 210 |
| 18 | 330 |
| 19 | 390 |
| 20 | 420 |
| 21 | 630 |
| 22 | 660 |
| 23 | 780 |
| 24 | 840 |
| 25 | 1260 |
| 26 | 1680 |
| 27 | 1848 |
| 28 | 1980 |
| 29 | 2310 |
| 30 | 2730 |
| 31 | 3570 |
| 32 | 3990 |
| 33 | 4290 |
| 34 | 4620 |
| 35 | 5460 |
| 36 | 6930 |
| 37 | 7140 |
| 38 | 7980 |
| 39 | 8190 |
| 40 | 8580 |
| 41 | 9240 |
| 42 | 10920 |
| 43 | 13860 |
| 44 | 16380 |
| 45 | 18480 |
| 46 | 21420 |
| 47 | 23940 |
| 48 | 25740 |
| 49 | 27720 |