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 | 128 |
| 2 | 2763 |
| 3 | 20252 |
| 4 | 107387 |
| 5 | 381812 |
| 6 | 1154141 |
| 7 | 2908232 |
| 8 | 6704631 |
| 9 | 13816144 |
| 10 | 26741121 |
| 11 | 48197940 |
| 12 | 83583525 |
| 13 | 137527528 |
| 14 | 219303553 |
| 15 | 336659016 |
| 16 | 505804957 |
| 17 | 737614588 |
| 18 | 1056435849 |
| 19 | 1478402044 |
| 20 | 2041032531 |
| 21 | 2764805264 |