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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 3 |
| 8 | 22 |
| 9 | 80 |
| 10 | 323 |
| 11 | 338 |
| 12 | 3322 |
| 13 | 3178 |
| 14 | 13590 |
| 15 | 43045 |
| 16 | 76881 |
| 17 | 48781 |
| 18 | 551137 |
| 19 | 93592 |
| 20 | 2190553 |
| 21 | 3163376 |
| 22 | 3542450 |
| 23 | 1065943 |
| 24 | 39341178 |
| 25 | 31694933 |