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) |
|---|---|
| 43 | 1 |
| 44 | 44 |
| 45 | 990 |
| 46 | 15180 |
| 47 | 178365 |
| 48 | 1712304 |
| 49 | 13983816 |
| 50 | 99884400 |
| 51 | 636763050 |
| 52 | 3679075400 |
| 53 | 19499099620 |
| 54 | 95722852680 |
| 55 | 438729741450 |
| 56 | 1889912732400 |
| 57 | 7694644696200 |
| 58 | 29752626158640 |
| 59 | 109712808959985 |
| 60 | 387221678682300 |
| 61 | 1312251244423350 |
| 62 | 4282083008118300 |
| 63 | 13488561475572645 |