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 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 9 |
| 4 | 45 |
| 5 | 97 |
| 6 | 485 |
| 7 | 1145 |
| 8 | 5725 |
| 9 | 14289 |
| 10 | 71445 |
| 11 | 185193 |
| 12 | 925965 |
| 13 | 2467137 |
| 14 | 12335685 |
| 15 | 33563481 |
| 16 | 167817405 |
| 17 | 464221105 |
| 18 | 2321105525 |
| 19 | 6507351113 |
| 20 | 32536755565 |
| 21 | 92236247841 |
| 22 | 461181239205 |
| 23 | 1319640776249 |
| 24 | 6598203881245 |
| 25 | 19031570387857 |
| 26 | 95157851939285 |