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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 36 |
| 6 | 109 |
| 7 | 265 |
| 8 | 762 |
| 9 | 2125 |
| 10 | 5964 |
| 11 | 17205 |
| 12 | 49989 |
| 13 | 145047 |
| 14 | 424155 |
| 15 | 1250298 |
| 16 | 3697457 |
| 17 | 10985390 |
| 18 | 32768938 |
| 19 | 98054446 |
| 20 | 294239322 |
| 21 | 885300000 |
| 22 | 2669959359 |
| 23 | 8069333311 |
| 24 | 24435519147 |