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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 10 |
| 6 | 21 |
| 7 | 42 |
| 8 | 89 |
| 9 | 184 |
| 10 | 371 |
| 11 | 758 |
| 12 | 1546 |
| 13 | 3122 |
| 14 | 6315 |
| 15 | 12782 |
| 16 | 25780 |
| 17 | 51962 |
| 18 | 104759 |
| 19 | 210934 |
| 20 | 424404 |
| 21 | 853806 |
| 22 | 1716759 |
| 23 | 3450158 |
| 24 | 6932169 |
| 25 | 13924260 |
| 26 | 27959805 |
| 27 | 56130762 |
| 28 | 112662414 |
| 29 | 226080318 |
| 30 | 453595341 |
| 31 | 909925794 |
| 32 | 1825052601 |
| 33 | 3660020992 |
| 34 | 7339006091 |