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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 5 |
| 6 | 14 |
| 7 | 21 |
| 8 | 48 |
| 9 | 87 |
| 10 | 180 |
| 11 | 341 |
| 12 | 704 |
| 13 | 1365 |
| 14 | 2758 |
| 15 | 5475 |
| 16 | 10976 |
| 17 | 21845 |
| 18 | 43806 |
| 19 | 87381 |
| 20 | 174960 |
| 21 | 349573 |
| 22 | 699402 |
| 23 | 1398101 |
| 24 | 2797008 |
| 25 | 5592425 |
| 26 | 11186188 |
| 27 | 22369797 |
| 28 | 44742040 |
| 29 | 89478485 |
| 30 | 178962840 |
| 31 | 357913941 |
| 32 | 715838912 |
| 33 | 1431656457 |
| 34 | 2863333392 |
| 35 | 5726623175 |
| 36 | 11453291400 |
| 37 | 22906492245 |
| 38 | 45813071890 |