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 | 11 |
| 4 | 44 |
| 5 | 183 |
| 6 | 774 |
| 7 | 3294 |
| 8 | 14034 |
| 9 | 59711 |
| 10 | 253430 |
| 11 | 1072506 |
| 12 | 4525168 |
| 13 | 19036726 |
| 14 | 79861404 |
| 15 | 334155036 |
| 16 | 1394789214 |
| 17 | 5808981711 |
| 18 | 24143440374 |
| 19 | 100156051746 |
| 20 | 414762312504 |
| 21 | 1714844273586 |
| 22 | 7079573497524 |
| 23 | 29187378344676 |
| 24 | 120180109515204 |
| 25 | 494264431607718 |
| 26 | 2030539136846844 |