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 | 3 |
| 1 | 19 |
| 2 | 79 |
| 3 | 283 |
| 4 | 940 |
| 5 | 2982 |
| 6 | 9171 |
| 7 | 27581 |
| 8 | 81557 |
| 9 | 237995 |
| 10 | 687158 |
| 11 | 1966764 |
| 12 | 5588259 |
| 13 | 15780103 |
| 14 | 44323195 |
| 15 | 123920827 |
| 16 | 345062176 |
| 17 | 957403026 |
| 18 | 2647935987 |
| 19 | 7302634865 |
| 20 | 20087869313 |
| 21 | 55128445259 |
| 22 | 150971982314 |