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 | 49 |
| 3 | 53 |
| 4 | 115 |
| 5 | 271 |
| 6 | 538 |
| 7 | 1458 |
| 8 | 2973 |
| 9 | 7826 |
| 10 | 19113 |
| 11 | 47074 |
| 12 | 115148 |
| 13 | 283156 |
| 14 | 698411 |
| 15 | 1720946 |
| 16 | 4258788 |
| 17 | 10518418 |
| 18 | 26019796 |
| 19 | 64391560 |
| 20 | 159345205 |
| 21 | 394533973 |
| 22 | 976872015 |
| 23 | 2419079852 |
| 24 | 5991435758 |
| 25 | 14839400772 |
| 26 | 36760610050 |
| 27 | 91064615465 |