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 | 1 |
| 1 | 19 |
| 2 | 190 |
| 3 | 1330 |
| 4 | 7315 |
| 5 | 33649 |
| 6 | 134596 |
| 7 | 480700 |
| 8 | 1562275 |
| 9 | 4686825 |
| 10 | 13079352 |
| 11 | 34084128 |
| 12 | 83204745 |
| 13 | 191006115 |
| 14 | 414237570 |
| 15 | 852920310 |
| 16 | 1675575165 |
| 17 | 3155247975 |
| 18 | 5719519850 |
| 19 | 10018268150 |
| 20 | 17013571223 |
| 21 | 28096825757 |
| 22 | 45238870040 |
| 23 | 71179679480 |
| 24 | 109665022415 |