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 | 3 |
| 5 | 6 |
| 6 | 10 |
| 7 | 24 |
| 8 | 47 |
| 9 | 113 |
| 10 | 258 |
| 11 | 624 |
| 12 | 1492 |
| 13 | 3694 |
| 14 | 9090 |
| 15 | 22753 |
| 16 | 57111 |
| 17 | 144541 |
| 18 | 367243 |
| 19 | 938449 |
| 20 | 2406720 |
| 21 | 6198045 |
| 22 | 16013447 |
| 23 | 41507254 |
| 24 | 107887092 |
| 25 | 281170859 |
| 26 | 734518306 |
| 27 | 1923119062 |
| 28 | 5045423169 |
| 29 | 13262334340 |
| 30 | 34923020733 |
| 31 | 92113656841 |