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 | 8 |
| 2 | 44 |
| 3 | 192 |
| 4 | 726 |
| 5 | 2464 |
| 6 | 7704 |
| 7 | 22527 |
| 8 | 62329 |
| 9 | 164516 |
| 10 | 416948 |
| 11 | 1019690 |
| 12 | 2416246 |
| 13 | 5565864 |
| 14 | 12498215 |
| 15 | 27421815 |
| 16 | 58903768 |
| 17 | 124088548 |
| 18 | 256749822 |
| 19 | 522450250 |
| 20 | 1046735092 |
| 21 | 2066948472 |
| 22 | 4026431543 |
| 23 | 7743987036 |
| 24 | 14715788745 |
| 25 | 27648250012 |
| 26 | 51390298666 |
| 27 | 94550761844 |