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 | 2 |
| 1 | 13 |
| 2 | 97 |
| 3 | 793 |
| 4 | 6817 |
| 5 | 60073 |
| 6 | 535537 |
| 7 | 4799353 |
| 8 | 43112257 |
| 9 | 387682633 |
| 10 | 3487832977 |
| 11 | 31385253913 |
| 12 | 282446313697 |
| 13 | 2541932937193 |
| 14 | 22877060890417 |
| 15 | 205892205836473 |
| 16 | 1853024483819137 |
| 17 | 16677198879535753 |
| 18 | 150094704016475857 |