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 | 60 |
| 2 | 132 |
| 3 | 292 |
| 4 | 644 |
| 5 | 1420 |
| 6 | 3132 |
| 7 | 6908 |
| 8 | 15236 |
| 9 | 33604 |
| 10 | 74116 |
| 11 | 163468 |
| 12 | 360540 |
| 13 | 795196 |
| 14 | 1753860 |
| 15 | 3868260 |
| 16 | 8531716 |
| 17 | 18817292 |
| 18 | 41502844 |
| 19 | 91537404 |
| 20 | 201892100 |
| 21 | 445287044 |
| 22 | 982111492 |
| 23 | 2166115084 |
| 24 | 4777517212 |
| 25 | 10537145916 |
| 26 | 23240406916 |
| 27 | 51258331044 |