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 | 3 |
| 2 | 4 |
| 3 | 7 |
| 4 | 11 |
| 5 | 29 |
| 6 | 40 |
| 7 | 109 |
| 8 | 912 |
| 9 | 1021 |
| 10 | 26437 |
| 11 | 27458 |
| 12 | 163727 |
| 13 | 191185 |
| 14 | 4369797 |
| 15 | 4560982 |
| 16 | 40857653 |
| 17 | 45418635 |
| 18 | 86276288 |
| 19 | 821905227 |
| 20 | 908181515 |
| 21 | 1730086742 |
| 22 | 7828528483 |
| 23 | 9558615225 |
| 24 | 26945758933 |
| 25 | 36504374158 |
| 26 | 99954507249 |
| 27 | 136458881407 |
| 28 | 372872270063 |
| 29 | 882203421533 |