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 | 3 |
| 4 | 8 |
| 5 | 20 |
| 6 | 50 |
| 7 | 121 |
| 8 | 297 |
| 9 | 716 |
| 10 | 1739 |
| 11 | 4198 |
| 12 | 10157 |
| 13 | 24513 |
| 14 | 59246 |
| 15 | 143006 |
| 16 | 345381 |
| 17 | 833792 |
| 18 | 2013272 |
| 19 | 4860337 |
| 20 | 11734717 |
| 21 | 28329772 |
| 22 | 68396030 |
| 23 | 165121957 |
| 24 | 398644144 |
| 25 | 962410246 |
| 26 | 2323475153 |
| 27 | 5609360573 |
| 28 | 13542220814 |
| 29 | 32693802921 |
| 30 | 78929886033 |
| 31 | 190553574988 |
| 32 | 460037180829 |
| 33 | 1110627936647 |