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) |
|---|---|
| 3 | 2 |
| 4 | 9 |
| 5 | 41 |
| 6 | 195 |
| 7 | 979 |
| 8 | 5204 |
| 9 | 29278 |
| 10 | 174029 |
| 11 | 1090335 |
| 12 | 7182335 |
| 13 | 49620133 |
| 14 | 358677988 |
| 15 | 2706692878 |
| 16 | 21279580773 |
| 17 | 173959285361 |
| 18 | 1476140369523 |
| 19 | 12980688801711 |
| 20 | 118115459494648 |
| 21 | 1110587753256570 |
| 22 | 10776530860299409 |
| 23 | 107787449481730311 |
| 24 | 1110043901404359391 |