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 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 19 |
| 4 | 64 |
| 5 | 192 |
| 6 | 532 |
| 7 | 1367 |
| 8 | 3319 |
| 9 | 7657 |
| 10 | 16928 |
| 11 | 36043 |
| 12 | 74287 |
| 13 | 148702 |
| 14 | 290071 |
| 15 | 552767 |
| 16 | 1031391 |
| 17 | 1887776 |
| 18 | 3395084 |
| 19 | 6007963 |
| 20 | 10474462 |
| 21 | 18010859 |
| 22 | 30574655 |
| 23 | 51284587 |
| 24 | 85064661 |
| 25 | 139620591 |
| 26 | 226914505 |
| 27 | 365371100 |
| 28 | 583164222 |
| 29 | 923075291 |
| 30 | 1449643115 |
| 31 | 2259616844 |