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) |
|---|---|
| 2 | 1 |
| 3 | 7 |
| 4 | 19 |
| 5 | 51 |
| 6 | 95 |
| 7 | 191 |
| 8 | 311 |
| 9 | 507 |
| 10 | 747 |
| 11 | 1135 |
| 12 | 1591 |
| 13 | 2195 |
| 14 | 2879 |
| 15 | 3863 |
| 16 | 4987 |
| 17 | 6399 |
| 18 | 7971 |
| 19 | 9979 |
| 20 | 12187 |
| 21 | 14815 |
| 22 | 17691 |
| 23 | 21307 |
| 24 | 25235 |
| 25 | 29735 |
| 26 | 34579 |
| 27 | 40479 |
| 28 | 46831 |
| 29 | 54019 |
| 30 | 61687 |
| 31 | 70419 |
| 32 | 79683 |
| 33 | 90095 |
| 34 | 101139 |
| 35 | 113983 |
| 36 | 127579 |
| 37 | 142423 |
| 38 | 158035 |
| 39 | 175939 |
| 40 | 194791 |