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 | 1 |
| 2 | 6 |
| 3 | 38 |
| 4 | 229 |
| 5 | 1349 |
| 6 | 7894 |
| 7 | 46122 |
| 8 | 269607 |
| 9 | 1578035 |
| 10 | 9251060 |
| 11 | 54322938 |
| 12 | 319502765 |
| 13 | 1882040458 |
| 14 | 11102029850 |
| 15 | 65576732025 |
| 16 | 387817554915 |
| 17 | 2296120266390 |
| 18 | 13608607411660 |
| 19 | 80732861599612 |
| 20 | 479372928880782 |