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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 13 |
| 6 | 35 |
| 7 | 97 |
| 8 | 274 |
| 9 | 785 |
| 10 | 2275 |
| 11 | 6656 |
| 12 | 19630 |
| 13 | 58295 |
| 14 | 174175 |
| 15 | 523238 |
| 16 | 1579584 |
| 17 | 4789919 |
| 18 | 14584723 |
| 19 | 44577799 |
| 20 | 136732988 |
| 21 | 420784888 |
| 22 | 1298937282 |
| 23 | 4021383654 |
| 24 | 12483820395 |
| 25 | 38853994422 |
| 26 | 121220646116 |
| 27 | 379062880051 |
| 28 | 1187912517953 |
| 29 | 3730305167438 |
| 30 | 11736596024002 |
| 31 | 36994041916973 |
| 32 | 116807229667919 |
| 33 | 369415244627269 |
| 34 | 1170113816365089 |