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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 8 |
| 8 | 15 |
| 9 | 26 |
| 10 | 47 |
| 11 | 82 |
| 12 | 151 |
| 13 | 269 |
| 14 | 494 |
| 15 | 891 |
| 16 | 1639 |
| 17 | 2978 |
| 18 | 5483 |
| 19 | 10006 |
| 20 | 18428 |
| 21 | 33749 |
| 22 | 62162 |
| 23 | 114083 |
| 24 | 210189 |
| 25 | 386292 |
| 26 | 711811 |
| 27 | 1309475 |
| 28 | 2413144 |
| 29 | 4442221 |
| 30 | 8186962 |
| 31 | 15077454 |
| 32 | 27789108 |
| 33 | 51193086 |
| 34 | 94357143 |
| 35 | 173859936 |
| 36 | 320462062 |
| 37 | 590555664 |
| 38 | 1088548290 |
| 39 | 2006193418 |
| 40 | 3697997558 |
| 41 | 6815841849 |
| 42 | 12563729268 |
| 43 | 23157428823 |
| 44 | 42686759863 |
| 45 | 78682454720 |
| 46 | 145038561665 |
| 47 | 267348052028 |
| 48 | 492815778109 |
| 49 | 908414736485 |