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 | 21 |
| 2 | 160 |
| 3 | 712 |
| 4 | 2285 |
| 5 | 5921 |
| 6 | 13216 |
| 7 | 26440 |
| 8 | 48657 |
| 9 | 83845 |
| 10 | 137016 |
| 11 | 214336 |
| 12 | 323245 |
| 13 | 472577 |
| 14 | 672680 |
| 15 | 935536 |
| 16 | 1274881 |
| 17 | 1706325 |
| 18 | 2247472 |
| 19 | 2918040 |
| 20 | 3739981 |
| 21 | 4737601 |
| 22 | 5937680 |
| 23 | 7369592 |
| 24 | 9065425 |
| 25 | 11060101 |
| 26 | 13391496 |
| 27 | 16100560 |
| 28 | 19231437 |
| 29 | 22831585 |