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) |
|---|---|
| 46 | 1 |
| 47 | 47 |
| 48 | 1128 |
| 49 | 18424 |
| 50 | 230300 |
| 51 | 2349060 |
| 52 | 20358520 |
| 53 | 154143080 |
| 54 | 1040465790 |
| 55 | 6358402050 |
| 56 | 35607051480 |
| 57 | 184509266760 |
| 58 | 891794789340 |
| 59 | 4047376351620 |
| 60 | 17345898649800 |
| 61 | 70539987842520 |
| 62 | 273342452889765 |
| 63 | 1012974972473835 |
| 64 | 3601688791018080 |
| 65 | 12321566916640800 |
| 66 | 40661170824914640 |