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 | 1 |
| 2 | 2 |
| 3 | 11 |
| 4 | 44 |
| 5 | 440 |
| 6 | 10340 |
| 7 | 130130 |
| 8 | 2242240 |
| 9 | 43103010 |
| 10 | 1412110200 |
| 11 | 40204314200 |
| 12 | 1440111022400 |
| 13 | 100223104131200 |
| 14 | 2412020120304300 |
| 15 | 132411104114234000 |
| 16 | 10220244333202404000 |
| 17 | 333110040323043033000 |
| 18 | 23203132442322131244000 |
| 19 | 2010023231311114130111000 |