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 | 50 |
| 3 | 314 |
| 4 | 1972 |
| 5 | 12386 |
| 6 | 77796 |
| 7 | 488636 |
| 8 | 3069120 |
| 9 | 19277130 |
| 10 | 121079578 |
| 11 | 760500364 |
| 12 | 4776699874 |
| 13 | 30002433636 |
| 14 | 188445170924 |
| 15 | 1183623397912 |
| 16 | 7434334035874 |
| 17 | 46695023649050 |
| 18 | 293291264969380 |
| 19 | 1842161313673506 |
| 20 | 11570608166423524 |
| 21 | 72674945645197500 |