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 | 2 |
| 2 | 8 |
| 3 | 33 |
| 4 | 131 |
| 5 | 497 |
| 6 | 1834 |
| 7 | 6635 |
| 8 | 23622 |
| 9 | 82942 |
| 10 | 287656 |
| 11 | 986552 |
| 12 | 3349165 |
| 13 | 11263951 |
| 14 | 37558235 |
| 15 | 124240204 |
| 16 | 407951848 |
| 17 | 1330340478 |
| 18 | 4310385956 |
| 19 | 13881618570 |
| 20 | 44451643311 |
| 21 | 141578435571 |
| 22 | 448634389388 |
| 23 | 1414774796929 |
| 24 | 4441038400458 |
| 25 | 13879652908322 |
| 26 | 43197263002063 |