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 | 13 |
| 3 | 109 |
| 4 | 433 |
| 5 | 757 |
| 6 | 3889 |
| 7 | 8209 |
| 8 | 17497 |
| 9 | 52489 |
| 10 | 58321 |
| 11 | 70957 |
| 12 | 1190701 |
| 13 | 1705861 |
| 14 | 2598157 |
| 15 | 6627097 |
| 16 | 13463173 |
| 17 | 57395629 |
| 18 | 23245229341 |
| 19 | 79320757897 |
| 20 | 1069604540569 |
| 21 | 1631815099669 |
| 22 | 5774114968057 |
| 23 | 8635817966221 |
| 24 | 23765922477217 |
| 25 | 43781455818469 |
| 26 | 307283335691329 |