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 | 6 |
| 1 | 10 |
| 2 | 20 |
| 3 | 46 |
| 4 | 116 |
| 5 | 310 |
| 6 | 860 |
| 7 | 2446 |
| 8 | 7076 |
| 9 | 20710 |
| 10 | 61100 |
| 11 | 181246 |
| 12 | 539636 |
| 13 | 1610710 |
| 14 | 4815740 |
| 15 | 14414446 |
| 16 | 43177796 |
| 17 | 129402310 |
| 18 | 387944780 |
| 19 | 1163310046 |
| 20 | 3488881556 |
| 21 | 10464547510 |
| 22 | 31389448220 |
| 23 | 94159956046 |
| 24 | 282463090916 |
| 25 | 847355718310 |