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) |
|---|---|
| 3 | 4 |
| 4 | 49 |
| 5 | 273 |
| 6 | 1023 |
| 7 | 3003 |
| 8 | 7462 |
| 9 | 16422 |
| 10 | 32946 |
| 11 | 61446 |
| 12 | 108031 |
| 13 | 180895 |
| 14 | 290745 |
| 15 | 451269 |
| 16 | 679644 |
| 17 | 997084 |
| 18 | 1429428 |
| 19 | 2007768 |
| 20 | 2769117 |
| 21 | 3757117 |
| 22 | 5022787 |
| 23 | 6625311 |
| 24 | 8632866 |
| 25 | 11123490 |
| 26 | 14185990 |
| 27 | 17920890 |
| 28 | 22441419 |
| 29 | 27874539 |
| 30 | 34362013 |
| 31 | 42061513 |
| 32 | 51147768 |
| 33 | 61813752 |
| 34 | 74271912 |