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 | 961 |
| 3 | 4719 |
| 4 | 16812 |
| 5 | 106833 |
| 6 | 493471 |
| 7 | 3275898 |
| 8 | 17232331 |
| 9 | 114004725 |
| 10 | 647020166 |
| 11 | 4243514607 |
| 12 | 25257749917 |
| 13 | 164582667340 |
| 14 | 1010000577881 |
| 15 | 6556696152743 |
| 16 | 41041784984580 |
| 17 | 265986401901157 |
| 18 | 1686689372009279 |
| 19 | 10927292093193426 |