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 | 0 |
| 3 | 26 |
| 4 | 232 |
| 5 | 1124 |
| 6 | 3896 |
| 7 | 10894 |
| 8 | 26192 |
| 9 | 56296 |
| 10 | 110960 |
| 11 | 204130 |
| 12 | 355000 |
| 13 | 589196 |
| 14 | 940072 |
| 15 | 1450134 |
| 16 | 2172576 |
| 17 | 3172944 |
| 18 | 4530912 |
| 19 | 6342186 |
| 20 | 8720520 |
| 21 | 11799860 |
| 22 | 15736600 |
| 23 | 20711966 |
| 24 | 26934512 |
| 25 | 34642744 |
| 26 | 44107856 |
| 27 | 55636594 |
| 28 | 69574232 |