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 | 4 |
| 2 | 18 |
| 3 | 74 |
| 4 | 182 |
| 5 | 358 |
| 6 | 746 |
| 7 | 1176 |
| 8 | 1854 |
| 9 | 2650 |
| 10 | 3870 |
| 11 | 5696 |
| 12 | 7358 |
| 13 | 9818 |
| 14 | 13052 |
| 15 | 16134 |
| 16 | 19742 |
| 17 | 24192 |
| 18 | 30048 |
| 19 | 36306 |
| 20 | 42932 |
| 21 | 50954 |
| 22 | 59904 |
| 23 | 70210 |
| 24 | 82646 |
| 25 | 93446 |
| 26 | 105640 |
| 27 | 117558 |
| 28 | 131950 |
| 29 | 148108 |
| 30 | 165772 |