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 | 0 |
| 2 | 34 |
| 3 | 194 |
| 4 | 934 |
| 5 | 6110 |
| 6 | 38736 |
| 7 | 251254 |
| 8 | 1610569 |
| 9 | 10296766 |
| 10 | 66243864 |
| 11 | 424625879 |
| 12 | 2726394062 |
| 13 | 17497812841 |
| 14 | 112298621494 |
| 15 | 720825717366 |
| 16 | 4626342158809 |
| 17 | 29694255667486 |
| 18 | 190589162278017 |
| 19 | 1223278644711981 |
| 20 | 7851527608519228 |