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 | 5 |
| 2 | 6 |
| 3 | 7 |
| 4 | 21 |
| 5 | 30 |
| 6 | 105 |
| 7 | 190 |
| 8 | 318 |
| 9 | 462 |
| 10 | 1974 |
| 11 | 1995 |
| 12 | 3390 |
| 13 | 10546 |
| 14 | 26886 |
| 15 | 86618 |
| 16 | 733533 |
| 17 | 3624222 |
| 18 | 6363183 |
| 19 | 13767810 |
| 20 | 17334030 |
| 21 | 37290610 |
| 22 | 56196114 |
| 23 | 56196174 |
| 24 | 56198055 |
| 25 | 56225085 |
| 26 | 56388130 |
| 27 | 56676030 |
| 28 | 60985974 |
| 29 | 84686126 |