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 | 4 |
| 2 | 18 |
| 3 | 1 |
| 4 | 150 |
| 5 | 1 |
| 6 | 294 |
| 7 | 1 |
| 8 | 270 |
| 9 | 1 |
| 10 | 726 |
| 11 | 1 |
| 12 | 35490 |
| 13 | 1 |
| 14 | 90 |
| 15 | 1 |
| 16 | 8670 |
| 17 | 1 |
| 18 | 15162 |
| 19 | 1 |
| 20 | 6930 |
| 21 | 1 |
| 22 | 3174 |
| 23 | 1 |
| 24 | 68250 |
| 25 | 1 |
| 26 | 162 |
| 27 | 1 |
| 28 | 25230 |
| 29 | 1 |
| 30 | 443982 |
| 31 | 1 |
| 32 | 16830 |
| 33 | 1 |
| 34 | 210 |
| 35 | 1 |
| 36 | 71010030 |
| 37 | 1 |
| 38 | 234 |
| 39 | 1 |
| 40 | 554730 |
| 41 | 1 |
| 42 | 77658 |
| 43 | 1 |
| 44 | 31050 |
| 45 | 1 |
| 46 | 13254 |
| 47 | 1 |
| 48 | 2274090 |
| 49 | 1 |
| 50 | 3366 |
| 51 | 1 |
| 52 | 84270 |
| 53 | 1 |
| 54 | 43890 |
| 55 | 1 |