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) |
|---|---|
| 0 | 1 |
| 1 | 29 |
| 2 | 85 |
| 3 | 197 |
| 4 | 529 |
| 5 | 1409 |
| 6 | 3865 |
| 7 | 10697 |
| 8 | 29929 |
| 9 | 84329 |
| 10 | 239065 |
| 11 | 681017 |
| 12 | 1947949 |
| 13 | 5591069 |
| 14 | 16095325 |
| 15 | 46453757 |
| 16 | 134375449 |
| 17 | 389477849 |
| 18 | 1130874025 |
| 19 | 3288774857 |
| 20 | 9577988869 |
| 21 | 27930345269 |
| 22 | 81543536005 |
| 23 | 238325254277 |
| 24 | 697235323189 |