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 | 36 |
| 1 | 169 |
| 2 | 1233 |
| 3 | 9745 |
| 4 | 77841 |
| 5 | 622609 |
| 6 | 4980753 |
| 7 | 39845905 |
| 8 | 318767121 |
| 9 | 2550136849 |
| 10 | 20401094673 |
| 11 | 163208757265 |
| 12 | 1305670058001 |
| 13 | 10445360463889 |
| 14 | 83562883710993 |
| 15 | 668503069687825 |
| 16 | 5348024557502481 |
| 17 | 42784196460019729 |
| 18 | 342273571680157713 |
| 19 | 2738188573441261585 |