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 | 21 |
| 1 | 203 |
| 2 | 896 |
| 3 | 2681 |
| 4 | 6371 |
| 5 | 13011 |
| 6 | 23878 |
| 7 | 40481 |
| 8 | 64561 |
| 9 | 98091 |
| 10 | 143276 |
| 11 | 202553 |
| 12 | 278591 |
| 13 | 374291 |
| 14 | 492786 |
| 15 | 637441 |
| 16 | 811853 |
| 17 | 1019851 |
| 18 | 1265496 |
| 19 | 1553081 |
| 20 | 1887131 |
| 21 | 2272403 |
| 22 | 2713886 |
| 23 | 3216801 |
| 24 | 3786601 |
| 25 | 4428971 |
| 26 | 5149828 |
| 27 | 5955321 |
| 28 | 6851831 |