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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 15 |
| 5 | 255 |
| 6 | 735 |
| 7 | 2624 |
| 8 | 3135 |
| 9 | 4095 |
| 10 | 4784 |
| 11 | 5264 |
| 12 | 5984 |
| 13 | 7215 |
| 14 | 7424 |
| 15 | 7904 |
| 16 | 9344 |
| 17 | 10064 |
| 18 | 10335 |
| 19 | 10815 |
| 20 | 11024 |
| 21 | 11984 |
| 22 | 12375 |
| 23 | 12495 |
| 24 | 13695 |
| 25 | 16184 |
| 26 | 16575 |
| 27 | 22575 |
| 28 | 22784 |
| 29 | 22815 |
| 30 | 26144 |
| 31 | 26264 |
| 32 | 27104 |
| 33 | 30015 |
| 34 | 30855 |
| 35 | 30975 |
| 36 | 32384 |
| 37 | 33824 |
| 38 | 34335 |
| 39 | 34544 |
| 40 | 38024 |
| 41 | 38415 |
| 42 | 39104 |