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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 41 |
| 6 | 121 |
| 7 | 355 |
| 8 | 1032 |
| 9 | 2973 |
| 10 | 8496 |
| 11 | 24111 |
| 12 | 68017 |
| 13 | 190885 |
| 14 | 533294 |
| 15 | 1484021 |
| 16 | 4115186 |
| 17 | 11375765 |
| 18 | 31358377 |
| 19 | 86223943 |
| 20 | 236540916 |
| 21 | 647556621 |
| 22 | 1769374932 |
| 23 | 4826148315 |
| 24 | 13142564449 |
| 25 | 35736448201 |
| 26 | 97037995226 |
| 27 | 263156279525 |
| 28 | 712795854422 |
| 29 | 1928547574913 |