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 | 6 |
| 2 | 34 |
| 3 | 194 |
| 4 | 1106 |
| 5 | 6306 |
| 6 | 35954 |
| 7 | 204994 |
| 8 | 1168786 |
| 9 | 6663906 |
| 10 | 37994674 |
| 11 | 216628994 |
| 12 | 1235123666 |
| 13 | 7042134306 |
| 14 | 40151166194 |
| 15 | 228924368194 |
| 16 | 1305226505746 |
| 17 | 7441830001506 |
| 18 | 42430056030514 |
| 19 | 241917600158594 |
| 20 | 1379308224915026 |