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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 8 |
| 5 | 13 |
| 6 | 74 |
| 7 | 124 |
| 8 | 784 |
| 9 | 1364 |
| 10 | 9069 |
| 11 | 16194 |
| 12 | 111144 |
| 13 | 202070 |
| 14 | 1418196 |
| 15 | 2612376 |
| 16 | 18642208 |
| 17 | 34682348 |
| 18 | 250706548 |
| 19 | 470066728 |
| 20 | 3433030048 |
| 21 | 6477333149 |
| 22 | 47703926354 |
| 23 | 90472092748 |
| 24 | 670963514192 |
| 25 | 1278016171132 |
| 26 | 9534032792470 |
| 27 | 18226719157820 |
| 28 | 136658371126320 |