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) |
|---|---|
| 56 | 1 |
| 57 | 57 |
| 58 | 1653 |
| 59 | 32509 |
| 60 | 487635 |
| 61 | 5949147 |
| 62 | 61474519 |
| 63 | 553270671 |
| 64 | 4426165368 |
| 65 | 31966749880 |
| 66 | 210980549208 |
| 67 | 1285063345176 |
| 68 | 7282025622664 |
| 69 | 38650751381832 |
| 70 | 193253756909160 |
| 71 | 914734449370024 |
| 72 | 4116305022165108 |
| 73 | 17675898036356052 |