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 | 2815 |
| 2 | 13751 |
| 3 | 54611 |
| 4 | 182411 |
| 5 | 589613 |
| 6 | 1727073 |
| 7 | 4830102 |
| 8 | 12936204 |
| 9 | 33205183 |
| 10 | 82794590 |
| 11 | 200519323 |
| 12 | 474103610 |
| 13 | 1097910960 |
| 14 | 2494672305 |
| 15 | 5575864988 |
| 16 | 12279125958 |
| 17 | 26681330332 |
| 18 | 57283519350 |
| 19 | 121646873615 |
| 20 | 255765799468 |