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 | 63 |
| 2 | 198 |
| 3 | 429 |
| 4 | 780 |
| 5 | 1275 |
| 6 | 1938 |
| 7 | 2793 |
| 8 | 3864 |
| 9 | 5175 |
| 10 | 6750 |
| 11 | 8613 |
| 12 | 10788 |
| 13 | 13299 |
| 14 | 16170 |
| 15 | 19425 |
| 16 | 23088 |
| 17 | 27183 |
| 18 | 31734 |
| 19 | 36765 |
| 20 | 42300 |
| 21 | 48363 |
| 22 | 54978 |
| 23 | 62169 |
| 24 | 69960 |
| 25 | 78375 |
| 26 | 87438 |
| 27 | 97173 |
| 28 | 107604 |
| 29 | 118755 |
| 30 | 130650 |
| 31 | 143313 |
| 32 | 156768 |
| 33 | 171039 |
| 34 | 186150 |
| 35 | 202125 |
| 36 | 218988 |
| 37 | 236763 |