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) |
|---|---|
| 0 | 10 |
| 1 | 201 |
| 2 | 4030 |
| 3 | 80801 |
| 4 | 1620050 |
| 5 | 32481801 |
| 6 | 651256070 |
| 7 | 13057603201 |
| 8 | 261803320090 |
| 9 | 5249124005001 |
| 10 | 105244283420110 |
| 11 | 2110134792407201 |
| 12 | 42307940131564130 |
| 13 | 848268937423689801 |
| 14 | 17007686688605360150 |
| 15 | 341002002709530892801 |