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 | 7 |
| 3 | 43 |
| 4 | 185 |
| 5 | 740 |
| 6 | 2900 |
| 7 | 11293 |
| 8 | 43897 |
| 9 | 170608 |
| 10 | 663438 |
| 11 | 2582058 |
| 12 | 10058862 |
| 13 | 39225116 |
| 14 | 153111686 |
| 15 | 598228961 |
| 16 | 2339499161 |
| 17 | 9157016216 |
| 18 | 35870666366 |
| 19 | 140623656686 |
| 20 | 551684484386 |
| 21 | 2165796506636 |
| 22 | 8507878418516 |
| 23 | 33441451138598 |