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) |
|---|---|
| 2 | 2 |
| 3 | 6 |
| 4 | 18 |
| 5 | 42 |
| 6 | 69 |
| 7 | 126 |
| 8 | 207 |
| 9 | 378 |
| 10 | 621 |
| 11 | 906 |
| 12 | 1311 |
| 13 | 1863 |
| 14 | 2718 |
| 15 | 3825 |
| 16 | 4509 |
| 17 | 5589 |
| 18 | 8154 |
| 19 | 11475 |
| 20 | 13527 |
| 21 | 16767 |
| 22 | 20130 |
| 23 | 24909 |
| 24 | 30894 |
| 25 | 36078 |
| 26 | 40581 |
| 27 | 50301 |
| 28 | 60390 |
| 29 | 72675 |
| 30 | 85671 |
| 31 | 92682 |
| 32 | 107910 |
| 33 | 118503 |
| 34 | 121743 |
| 35 | 150903 |