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 | 2 |
| 2 | 4 |
| 3 | 11 |
| 4 | 32 |
| 5 | 97 |
| 6 | 355 |
| 7 | 1423 |
| 8 | 5696 |
| 9 | 23141 |
| 10 | 108149 |
| 11 | 559693 |
| 12 | 2913971 |
| 13 | 14806365 |
| 14 | 75692999 |
| 15 | 432849976 |
| 16 | 2780749376 |
| 17 | 18237870285 |
| 18 | 115493756737 |
| 19 | 708062095921 |
| 20 | 4354275076517 |
| 21 | 29539724932771 |
| 22 | 227955214198529 |
| 23 | 1836106089485736 |
| 24 | 14279737884301139 |
| 25 | 105409744347318897 |