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 | 42677635 |
| 2 | 276742235 |
| 3 | 6439057062 |
| 4 | 7512673242 |
| 5 | 43592652562 |
| 6 | 48847956255 |
| 7 | 48880963215 |
| 8 | 55018687182 |
| 9 | 60184185702 |
| 10 | 91484515395 |
| 11 | 100774916235 |
| 12 | 101926379835 |
| 13 | 111886551315 |
| 14 | 122388340095 |
| 15 | 133012188855 |
| 16 | 137978601142 |
| 17 | 247631352255 |
| 18 | 263171068875 |
| 19 | 293467635615 |
| 20 | 305946896255 |