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 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 50 |
| 5 | 250 |
| 6 | 1250 |
| 7 | 2810 |
| 8 | 5050 |
| 9 | 6250 |
| 10 | 14050 |
| 11 | 25250 |
| 12 | 31250 |
| 13 | 40210 |
| 14 | 70250 |
| 15 | 126250 |
| 16 | 156250 |
| 17 | 201050 |
| 18 | 351250 |
| 19 | 510050 |
| 20 | 631250 |
| 21 | 650050 |
| 22 | 781250 |
| 23 | 789610 |
| 24 | 1005250 |
| 25 | 1265050 |
| 26 | 1419050 |
| 27 | 1756250 |
| 28 | 2550250 |
| 29 | 3156250 |
| 30 | 3250250 |
| 31 | 3906250 |
| 32 | 3948050 |
| 33 | 5026250 |
| 34 | 6325250 |
| 35 | 7095250 |
| 36 | 8781250 |
| 37 | 9478130 |