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 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 40 |
| 5 | 114 |
| 6 | 323 |
| 7 | 910 |
| 8 | 2551 |
| 9 | 7120 |
| 10 | 19796 |
| 11 | 54852 |
| 12 | 151525 |
| 13 | 417434 |
| 14 | 1147145 |
| 15 | 3145394 |
| 16 | 8606848 |
| 17 | 23507190 |
| 18 | 64093031 |
| 19 | 174474790 |
| 20 | 474261691 |
| 21 | 1287398452 |
| 22 | 3490267820 |
| 23 | 9451319304 |
| 24 | 25565098825 |
| 25 | 69080289074 |