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 | 8 |
| 3 | 41 |
| 4 | 241 |
| 5 | 1394 |
| 6 | 8196 |
| 7 | 48417 |
| 8 | 288100 |
| 9 | 1724882 |
| 10 | 10388788 |
| 11 | 62914457 |
| 12 | 382957903 |
| 13 | 2342043630 |
| 14 | 14385595262 |
| 15 | 88716792134 |
| 16 | 549159544833 |
| 17 | 3411043554787 |
| 18 | 21255166581480 |
| 19 | 132841213701954 |
| 20 | 832537685724170 |
| 21 | 5231154448179004 |