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 | 16 |
| 2 | 97 |
| 3 | 515 |
| 4 | 2744 |
| 5 | 15177 |
| 6 | 88033 |
| 7 | 536882 |
| 8 | 3441439 |
| 9 | 23151411 |
| 10 | 163135410 |
| 11 | 1201594675 |
| 12 | 9232595661 |
| 13 | 73858810120 |
| 14 | 614045917741 |
| 15 | 5296398334735 |
| 16 | 47321198203496 |
| 17 | 437310785441381 |
| 18 | 4174403973827181 |
| 19 | 41107555809612466 |
| 20 | 417122543915965091 |
| 21 | 4356601173778017487 |