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 | 7 |
| 3 | 8 |
| 4 | 71 |
| 5 | 150 |
| 6 | 1271 |
| 7 | 1421 |
| 8 | 12639 |
| 9 | 26699 |
| 10 | 226231 |
| 11 | 931623 |
| 12 | 4884346 |
| 13 | 44890737 |
| 14 | 4884346 |
| 15 | 64428121 |
| 16 | 327024951 |
| 17 | 718478023 |
| 18 | 2482459020 |
| 19 | 13130773123 |
| 20 | 41874778389 |
| 21 | 264379443457 |
| 22 | 41874778389 |
| 23 | 348129000235 |
| 24 | 2826906780269 |
| 25 | 20136476462118 |
| 26 | 83372812628741 |