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 | 15 |
| 4 | 30 |
| 5 | 143 |
| 6 | 286 |
| 7 | 2145 |
| 8 | 3599 |
| 9 | 4290 |
| 10 | 5183 |
| 11 | 7198 |
| 12 | 10366 |
| 13 | 11663 |
| 14 | 23326 |
| 15 | 32399 |
| 16 | 36863 |
| 17 | 51983 |
| 18 | 53985 |
| 19 | 57599 |
| 20 | 64798 |
| 21 | 73726 |
| 22 | 77745 |
| 23 | 97343 |
| 24 | 103966 |
| 25 | 107970 |
| 26 | 115198 |
| 27 | 121103 |
| 28 | 155490 |
| 29 | 174945 |
| 30 | 176399 |
| 31 | 186623 |
| 32 | 194686 |
| 33 | 242206 |
| 34 | 349890 |
| 35 | 352798 |
| 36 | 359999 |
| 37 | 373246 |
| 38 | 435599 |
| 39 | 485985 |