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 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 116 |
| 6 | 521 |
| 7 | 1877 |
| 8 | 5531 |
| 9 | 13939 |
| 10 | 31156 |
| 11 | 63416 |
| 12 | 119802 |
| 13 | 213006 |
| 14 | 360179 |
| 15 | 583871 |
| 16 | 913061 |
| 17 | 1384277 |
| 18 | 2042806 |
| 19 | 2943994 |
| 20 | 4154636 |
| 21 | 5754456 |
| 22 | 7837677 |
| 23 | 10514681 |
| 24 | 13913759 |
| 25 | 18182951 |
| 26 | 23491976 |
| 27 | 30034252 |
| 28 | 38029006 |
| 29 | 47723474 |
| 30 | 59395191 |
| 31 | 73354371 |
| 32 | 89946377 |