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 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 6 |
| 6 | 3 |
| 7 | 1 |
| 8 | 20 |
| 9 | 15 |
| 10 | 4 |
| 11 | 1 |
| 12 | 70 |
| 13 | 84 |
| 14 | 28 |
| 15 | 5 |
| 16 | 1 |
| 17 | 252 |
| 18 | 495 |
| 19 | 220 |
| 20 | 45 |
| 21 | 6 |
| 22 | 1 |
| 23 | 924 |
| 24 | 3003 |
| 25 | 1820 |
| 26 | 455 |
| 27 | 66 |
| 28 | 7 |
| 29 | 1 |
| 30 | 3432 |
| 31 | 18564 |
| 32 | 15504 |
| 33 | 4845 |
| 34 | 816 |
| 35 | 91 |
| 36 | 8 |
| 37 | 1 |
| 38 | 12870 |
| 39 | 116280 |
| 40 | 134596 |
| 41 | 53130 |
| 42 | 10626 |
| 43 | 1330 |
| 44 | 120 |
| 45 | 9 |
| 46 | 1 |
| 47 | 48620 |
| 48 | 735471 |
| 49 | 1184040 |
| 50 | 593775 |
| 51 | 142506 |
| 52 | 20475 |
| 53 | 2024 |
| 54 | 153 |
| 55 | 10 |