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 | 0 |
| 2 | 0 |
| 3 | 38 |
| 4 | 340 |
| 5 | 1630 |
| 6 | 5552 |
| 7 | 15210 |
| 8 | 35828 |
| 9 | 75530 |
| 10 | 146240 |
| 11 | 264702 |
| 12 | 453620 |
| 13 | 742918 |
| 14 | 1171120 |
| 15 | 1786850 |
| 16 | 2650452 |
| 17 | 3835730 |
| 18 | 5431808 |
| 19 | 7545110 |
| 20 | 10301460 |
| 21 | 13848302 |
| 22 | 18357040 |
| 23 | 24025498 |
| 24 | 31080500 |
| 25 | 39780570 |
| 26 | 50418752 |
| 27 | 63325550 |
| 28 | 78871988 |
| 29 | 97472790 |
| 30 | 119589680 |
| 31 | 145734802 |