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 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 7 |
| 6 | 14 |
| 7 | 29 |
| 8 | 47 |
| 9 | 79 |
| 10 | 134 |
| 11 | 269 |
| 12 | 395 |
| 13 | 791 |
| 14 | 1295 |
| 15 | 2015 |
| 16 | 2687 |
| 17 | 5375 |
| 18 | 7343 |
| 19 | 14687 |
| 20 | 20519 |
| 21 | 30399 |
| 22 | 47999 |
| 23 | 95999 |
| 24 | 121439 |
| 25 | 170015 |
| 26 | 266111 |
| 27 | 338687 |
| 28 | 458639 |
| 29 | 917279 |
| 30 | 1166399 |
| 31 | 2332799 |
| 32 | 2764799 |
| 33 | 3932159 |
| 34 | 6082559 |
| 35 | 8211455 |
| 36 | 9797759 |
| 37 | 19595519 |