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 | 793 |
| 3 | 66377 |
| 4 | 1911234 |
| 5 | 28504515 |
| 6 | 271739011 |
| 7 | 1874885963 |
| 8 | 10136389172 |
| 9 | 45311985069 |
| 10 | 173957200405 |
| 11 | 589679082421 |
| 12 | 1802148522758 |
| 13 | 5045944649967 |
| 14 | 13108508706879 |
| 15 | 31915866810295 |
| 16 | 73427944186856 |
| 17 | 160710828298553 |
| 18 | 336507487921137 |
| 19 | 677266380588289 |
| 20 | 1315464522556810 |