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 | 10 |
| 4 | 35 |
| 5 | 184 |
| 6 | 1531 |
| 7 | 21080 |
| 8 | 497017 |
| 9 | 20533486 |
| 10 | 1508839043 |
| 11 | 199272672334 |
| 12 | 47686000150774 |
| 13 | 20817464210086523 |
| 14 | 16678749474397158418 |
| 15 | 24657143458135746104239 |
| 16 | 67591557017940565183386368 |