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 | 5 |
| 4 | 22 |
| 5 | 49 |
| 6 | 71 |
| 7 | 120 |
| 8 | 2231 |
| 9 | 2351 |
| 10 | 4582 |
| 11 | 11515 |
| 12 | 50642 |
| 13 | 112799 |
| 14 | 163441 |
| 15 | 276240 |
| 16 | 5135761 |
| 17 | 5412001 |
| 18 | 10547762 |
| 19 | 26507525 |
| 20 | 116577862 |
| 21 | 259663249 |
| 22 | 376241111 |
| 23 | 635904360 |
| 24 | 11822519591 |
| 25 | 12458423951 |
| 26 | 24280943542 |
| 27 | 61020311035 |
| 28 | 268362187682 |
| 29 | 597744686399 |