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) |
|---|---|
| 0 | 0 |
| 1 | 10 |
| 2 | 60 |
| 3 | 210 |
| 4 | 560 |
| 5 | 1260 |
| 6 | 2520 |
| 7 | 4620 |
| 8 | 7920 |
| 9 | 12870 |
| 10 | 20020 |
| 11 | 30030 |
| 12 | 43680 |
| 13 | 61880 |
| 14 | 85680 |
| 15 | 116280 |
| 16 | 155040 |
| 17 | 203490 |
| 18 | 263340 |
| 19 | 336490 |
| 20 | 425040 |
| 21 | 531300 |
| 22 | 657800 |
| 23 | 807300 |
| 24 | 982800 |
| 25 | 1187550 |
| 26 | 1425060 |
| 27 | 1699110 |
| 28 | 2013760 |
| 29 | 2373360 |
| 30 | 2782560 |
| 31 | 3246320 |
| 32 | 3769920 |
| 33 | 4358970 |
| 34 | 5019420 |