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 | 22 |
| 3 | 55 |
| 4 | 129 |
| 5 | 511 |
| 6 | 770 |
| 7 | 1070 |
| 8 | 1071 |
| 9 | 1074 |
| 10 | 1434 |
| 11 | 1708 |
| 12 | 1914 |
| 13 | 2721 |
| 14 | 2926 |
| 15 | 3080 |
| 16 | 4195 |
| 17 | 4464 |
| 18 | 4814 |
| 19 | 4879 |
| 20 | 5236 |
| 21 | 5907 |
| 22 | 6086 |
| 23 | 6114 |
| 24 | 7228 |
| 25 | 7831 |
| 26 | 8029 |
| 27 | 8289 |
| 28 | 9086 |
| 29 | 10149 |
| 30 | 10547 |
| 31 | 11145 |
| 32 | 12305 |
| 33 | 12621 |
| 34 | 13348 |
| 35 | 14993 |
| 36 | 15012 |
| 37 | 16212 |
| 38 | 17670 |
| 39 | 19513 |
| 40 | 20020 |
| 41 | 20083 |