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 | 31 |
| 2 | 211 |
| 3 | 4651 |
| 4 | 61051 |
| 5 | 371281 |
| 6 | 723901 |
| 7 | 1803001 |
| 8 | 2861461 |
| 9 | 4329151 |
| 10 | 4925281 |
| 11 | 7086451 |
| 12 | 7944301 |
| 13 | 14835031 |
| 14 | 19611901 |
| 15 | 23382031 |
| 16 | 44119351 |
| 17 | 54664711 |
| 18 | 86548801 |
| 19 | 97792531 |
| 20 | 162478501 |
| 21 | 189882031 |
| 22 | 267217051 |
| 23 | 293109961 |
| 24 | 306740281 |
| 25 | 490099501 |