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 | 15 |
| 4 | 28 |
| 5 | 57 |
| 6 | 98 |
| 7 | 179 |
| 8 | 304 |
| 9 | 521 |
| 10 | 894 |
| 11 | 1519 |
| 12 | 2576 |
| 13 | 4381 |
| 14 | 7434 |
| 15 | 12603 |
| 16 | 21380 |
| 17 | 36265 |
| 18 | 61486 |
| 19 | 104263 |
| 20 | 176808 |
| 21 | 299797 |