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 | 1 |
| 2 | 6 |
| 3 | 45 |
| 4 | 60 |
| 5 | 90 |
| 6 | 270 |
| 7 | 420 |
| 8 | 630 |
| 9 | 672 |
| 10 | 2970 |
| 11 | 5460 |
| 12 | 8190 |
| 13 | 9072 |
| 14 | 9100 |
| 15 | 10080 |
| 16 | 15925 |
| 17 | 22680 |
| 18 | 22848 |
| 19 | 27300 |
| 20 | 30240 |
| 21 | 40950 |
| 22 | 45360 |
| 23 | 54600 |
| 24 | 81900 |
| 25 | 95550 |
| 26 | 99792 |
| 27 | 136500 |
| 28 | 163800 |
| 29 | 172900 |
| 30 | 204750 |
| 31 | 208656 |
| 32 | 245700 |
| 33 | 249480 |
| 34 | 312480 |
| 35 | 332640 |
| 36 | 342720 |
| 37 | 385560 |
| 38 | 409500 |
| 39 | 472500 |
| 40 | 491400 |