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 | 137 |
| 2 | 1267 |
| 3 | 6412 |
| 4 | 23597 |
| 5 | 70707 |
| 6 | 183099 |
| 7 | 424809 |
| 8 | 904299 |
| 9 | 1795794 |
| 10 | 3367364 |
| 11 | 6017011 |
| 12 | 10318126 |
| 13 | 17075786 |
| 14 | 27395466 |
| 15 | 42765846 |
| 16 | 65157498 |
| 17 | 97139343 |
| 18 | 142014873 |
| 19 | 203980238 |
| 20 | 288306403 |
| 21 | 401547685 |
| 22 | 551779085 |
| 23 | 748864935 |
| 24 | 1004761485 |
| 25 | 1333856160 |
| 26 | 1753346322 |
| 27 | 2283660477 |