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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 35 |
| 5 | 70 |
| 6 | 210 |
| 7 | 330 |
| 8 | 715 |
| 9 | 1001 |
| 10 | 1820 |
| 11 | 2380 |
| 12 | 3876 |
| 13 | 4845 |
| 14 | 7315 |
| 15 | 8855 |
| 16 | 12650 |
| 17 | 14950 |
| 18 | 20475 |
| 19 | 23751 |
| 20 | 31465 |
| 21 | 35960 |
| 22 | 46376 |
| 23 | 52360 |
| 24 | 66045 |
| 25 | 73815 |
| 26 | 91390 |
| 27 | 101270 |
| 28 | 123410 |
| 29 | 135751 |
| 30 | 163185 |
| 31 | 178365 |
| 32 | 211876 |
| 33 | 230300 |
| 34 | 270725 |
| 35 | 292825 |
| 36 | 341055 |
| 37 | 367290 |
| 38 | 424270 |