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) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 24 |
| 5 | 53 |
| 6 | 118 |
| 7 | 253 |
| 8 | 542 |
| 9 | 1143 |
| 10 | 2396 |
| 11 | 4986 |
| 12 | 10330 |
| 13 | 21304 |
| 14 | 43808 |
| 15 | 89837 |
| 16 | 183838 |
| 17 | 375514 |
| 18 | 765880 |
| 19 | 1559979 |
| 20 | 3173794 |
| 21 | 6450514 |
| 22 | 13098246 |
| 23 | 26574968 |
| 24 | 53877266 |
| 25 | 109153818 |
| 26 | 221002456 |
| 27 | 447199458 |
| 28 | 904420716 |
| 29 | 1828192748 |
| 30 | 3693782678 |
| 31 | 7459897213 |
| 32 | 15059812760 |
| 33 | 30390898331 |