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 | 2 |
| 2 | 7 |
| 3 | 117241 |
| 4 | 1351781 |
| 5 | 3703429 |
| 6 | 243729623 |
| 7 | 486707171 |
| 8 | 568561471 |
| 9 | 766634423 |
| 10 | 883314979 |
| 11 | 1058403331 |
| 12 | 1520509423 |
| 13 | 1933700891 |
| 14 | 1997566367 |
| 15 | 2063533819 |
| 16 | 2632011079 |
| 17 | 3040681037 |
| 18 | 3591772153 |
| 19 | 4114380107 |
| 20 | 7870826569 |
| 21 | 8414671219 |