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 | 0 |
| 2 | 217 |
| 3 | 220 |
| 4 | 717 |
| 5 | 1900 |
| 6 | 1917 |
| 7 | 4780 |
| 8 | 11661 |
| 9 | 11760 |
| 10 | 28441 |
| 11 | 68544 |
| 12 | 69121 |
| 13 | 166344 |
| 14 | 400081 |
| 15 | 403444 |
| 16 | 970101 |
| 17 | 2332420 |
| 18 | 2352021 |
| 19 | 5654740 |
| 20 | 13594917 |
| 21 | 13709160 |
| 22 | 32958817 |
| 23 | 79237560 |
| 24 | 79903417 |
| 25 | 192098640 |
| 26 | 461830921 |
| 27 | 465711820 |
| 28 | 1119633501 |
| 29 | 2691748444 |
| 30 | 2714367981 |