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) |
|---|---|
| 52 | 1 |
| 53 | 53 |
| 54 | 1431 |
| 55 | 26235 |
| 56 | 367290 |
| 57 | 4187106 |
| 58 | 40475358 |
| 59 | 341149446 |
| 60 | 2558620845 |
| 61 | 17341763505 |
| 62 | 107518933731 |
| 63 | 615790256823 |
| 64 | 3284214703056 |
| 65 | 16421073515280 |
| 66 | 77413632286320 |
| 67 | 345780890878896 |
| 68 | 1469568786235308 |
| 69 | 5964720367660956 |