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 | 3 |
| 3 | 7 |
| 4 | 23 |
| 5 | 76 |
| 6 | 249 |
| 7 | 974 |
| 8 | 4151 |
| 9 | 16558 |
| 10 | 70308 |
| 11 | 342937 |
| 12 | 1680725 |
| 13 | 8012252 |
| 14 | 40903572 |
| 15 | 222539812 |
| 16 | 1202060807 |
| 17 | 6608077855 |
| 18 | 38523427818 |
| 19 | 228629565951 |
| 20 | 1349303611408 |
| 21 | 8257330774574 |
| 22 | 53118486147015 |
| 23 | 345693735519287 |
| 24 | 2252515985849693 |
| 25 | 15028013765653626 |
| 26 | 102689873016938288 |