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 | 3 |
| 3 | 6 |
| 4 | 13 |
| 5 | 28 |
| 6 | 60 |
| 7 | 129 |
| 8 | 277 |
| 9 | 595 |
| 10 | 1278 |
| 11 | 2745 |
| 12 | 5896 |
| 13 | 12664 |
| 14 | 27201 |
| 15 | 58425 |
| 16 | 125491 |
| 17 | 269542 |
| 18 | 578949 |
| 19 | 1243524 |
| 20 | 2670964 |
| 21 | 5736961 |
| 22 | 12322413 |
| 23 | 26467299 |
| 24 | 56849086 |
| 25 | 122106097 |
| 26 | 262271568 |
| 27 | 563332848 |
| 28 | 1209982081 |
| 29 | 2598919345 |
| 30 | 5582216355 |
| 31 | 11990037126 |
| 32 | 25753389181 |