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 | 1 |
| 3 | 3 |
| 4 | 8 |
| 5 | 25 |
| 6 | 77 |
| 7 | 262 |
| 8 | 897 |
| 9 | 3208 |
| 10 | 11658 |
| 11 | 43243 |
| 12 | 162477 |
| 13 | 618219 |
| 14 | 2374699 |
| 15 | 9200541 |
| 16 | 35903017 |
| 17 | 140997527 |
| 18 | 556798525 |
| 19 | 2209685939 |
| 20 | 8807924914 |
| 21 | 35248187347 |
| 22 | 141564134395 |
| 23 | 570402287162 |
| 24 | 2305138038036 |
| 25 | 9340981510156 |
| 26 | 37946616550787 |