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 | 1 |
| 3 | 4 |
| 4 | 7 |
| 5 | 18 |
| 6 | 37 |
| 7 | 85 |
| 8 | 183 |
| 9 | 407 |
| 10 | 888 |
| 11 | 1956 |
| 12 | 4284 |
| 13 | 9409 |
| 14 | 20630 |
| 15 | 45270 |
| 16 | 99289 |
| 17 | 217819 |
| 18 | 477776 |
| 19 | 1048053 |
| 20 | 2298912 |
| 21 | 5042783 |
| 22 | 11061455 |
| 23 | 24263687 |
| 24 | 53223023 |
| 25 | 116746272 |
| 26 | 256086074 |
| 27 | 561731936 |
| 28 | 1232174181 |
| 29 | 2702807740 |
| 30 | 5928681960 |
| 31 | 13004724921 |
| 32 | 28526216361 |