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 | 2 |
| 3 | 4 |
| 4 | 9 |
| 5 | 19 |
| 6 | 43 |
| 7 | 93 |
| 8 | 207 |
| 9 | 453 |
| 10 | 999 |
| 11 | 2185 |
| 12 | 4796 |
| 13 | 10470 |
| 14 | 22871 |
| 15 | 49815 |
| 16 | 108427 |
| 17 | 235515 |
| 18 | 511074 |
| 19 | 1107248 |
| 20 | 2396299 |
| 21 | 5179169 |
| 22 | 11181877 |
| 23 | 24113939 |
| 24 | 51949572 |
| 25 | 111801422 |
| 26 | 240381703 |
| 27 | 516355235 |
| 28 | 1108186951 |
| 29 | 2376314763 |
| 30 | 5091422730 |
| 31 | 10900063776 |
| 32 | 23317805916 |