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) |
|---|---|
| 2 | 10 |
| 3 | 40 |
| 4 | 342 |
| 5 | 1279 |
| 6 | 11016 |
| 7 | 41462 |
| 8 | 359530 |
| 9 | 1365014 |
| 10 | 11899516 |
| 11 | 45501743 |
| 12 | 398306769 |
| 13 | 1531614109 |
| 14 | 13450930624 |
| 15 | 51952990090 |
| 16 | 457449811458 |
| 17 | 1773182087440 |
| 18 | 15646091896400 |
| 19 | 60825762159338 |
| 20 | 537651887201990 |
| 21 | 2095280066101886 |
| 22 | 18547910336883720 |
| 23 | 72432026278468535 |