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 | 6 |
| 3 | 35 |
| 4 | 154 |
| 5 | 613 |
| 6 | 2362 |
| 7 | 9028 |
| 8 | 34510 |
| 9 | 132241 |
| 10 | 508210 |
| 11 | 1958460 |
| 12 | 7565906 |
| 13 | 29292820 |
| 14 | 113633930 |
| 15 | 441579702 |
| 16 | 1718642278 |
| 17 | 6698377449 |
| 18 | 26139863330 |
| 19 | 102125977396 |
| 20 | 399415127682 |
| 21 | 1563614796608 |
| 22 | 6126581578954 |
| 23 | 24024810462810 |
| 24 | 94281930087290 |
| 25 | 370254213115948 |
| 26 | 1454967778894282 |