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 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 37 |
| 4 | 228 |
| 5 | 1405 |
| 6 | 8658 |
| 7 | 53353 |
| 8 | 328776 |
| 9 | 2026009 |
| 10 | 12484830 |
| 11 | 76934989 |
| 12 | 474094764 |
| 13 | 2921503573 |
| 14 | 18003116202 |
| 15 | 110940200785 |
| 16 | 683644320912 |
| 17 | 4212806126257 |
| 18 | 25960481078454 |
| 19 | 159975692596981 |
| 20 | 985814636660340 |
| 21 | 6074863512559021 |
| 22 | 37434995712014466 |
| 23 | 230684837784645817 |