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 | 3 |
| 3 | 6 |
| 4 | 20 |
| 5 | 30 |
| 6 | 60 |
| 7 | 168 |
| 8 | 420 |
| 9 | 840 |
| 10 | 1980 |
| 11 | 2160 |
| 12 | 2520 |
| 13 | 7560 |
| 14 | 10080 |
| 15 | 15120 |
| 16 | 27720 |
| 17 | 79200 |
| 18 | 83160 |
| 19 | 110880 |
| 20 | 166320 |
| 21 | 262080 |
| 22 | 332640 |
| 23 | 554400 |
| 24 | 786240 |
| 25 | 831600 |
| 26 | 1081080 |
| 27 | 1441440 |
| 28 | 2162160 |
| 29 | 2882880 |
| 30 | 4324320 |
| 31 | 7207200 |
| 32 | 8648640 |
| 33 | 10810800 |
| 34 | 17297280 |
| 35 | 21621600 |
| 36 | 36756720 |
| 37 | 43243200 |