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 | 4 |
| 2 | 11 |
| 3 | 22 |
| 4 | 39 |
| 5 | 66 |
| 6 | 111 |
| 7 | 190 |
| 8 | 335 |
| 9 | 610 |
| 10 | 1143 |
| 11 | 2190 |
| 12 | 4263 |
| 13 | 8386 |
| 14 | 16607 |
| 15 | 33022 |
| 16 | 65823 |
| 17 | 131394 |
| 18 | 262503 |
| 19 | 524686 |
| 20 | 1049015 |
| 21 | 2097634 |
| 22 | 4194831 |
| 23 | 8389182 |
| 24 | 16777839 |
| 25 | 33555106 |
| 26 | 67109591 |