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) |
|---|---|
| 1 | 1 |
| 2 | 60 |
| 3 | 1959 |
| 4 | 149587 |
| 5 | 277947 |
| 6 | 1449933 |
| 7 | 2222863 |
| 8 | 2396214 |
| 9 | 24918486 |
| 10 | 25354845 |
| 11 | 48878262 |
| 12 | 1673533845 |
| 13 | 24753647943 |