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 | 3 |
| 2 | 14 |
| 3 | 46 |
| 4 | 133 |
| 5 | 364 |
| 6 | 972 |
| 7 | 2567 |
| 8 | 6746 |
| 9 | 17690 |
| 10 | 46345 |
| 11 | 121368 |
| 12 | 317784 |
| 13 | 832011 |
| 14 | 2178278 |
| 15 | 5702854 |
| 16 | 14930317 |
| 17 | 39088132 |
| 18 | 102334116 |
| 19 | 267914255 |
| 20 | 701408690 |
| 21 | 1836311858 |
| 22 | 4807526929 |
| 23 | 12586268976 |
| 24 | 32951280048 |
| 25 | 86267571219 |
| 26 | 225851433662 |