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 | 31 |
| 3 | 175 |
| 4 | 1015 |
| 5 | 5911 |
| 6 | 34447 |
| 7 | 200767 |
| 8 | 1170151 |
| 9 | 6820135 |
| 10 | 39750655 |
| 11 | 231683791 |
| 12 | 1350352087 |
| 13 | 7870428727 |
| 14 | 45872220271 |
| 15 | 267362892895 |
| 16 | 1558305137095 |
| 17 | 9082467929671 |
| 18 | 52936502440927 |
| 19 | 308536546715887 |
| 20 | 1798282777854391 |
| 21 | 10481160120410455 |
| 22 | 61088677944608335 |