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 | 1 |
| 1 | 126 |
| 2 | 1932 |
| 3 | 12138 |
| 4 | 47544 |
| 5 | 140070 |
| 6 | 341796 |
| 7 | 730002 |
| 8 | 1412208 |
| 9 | 2531214 |
| 10 | 4270140 |
| 11 | 6857466 |
| 12 | 10572072 |
| 13 | 15748278 |
| 14 | 22780884 |
| 15 | 32130210 |
| 16 | 44327136 |
| 17 | 59978142 |
| 18 | 79770348 |
| 19 | 104476554 |
| 20 | 134960280 |
| 21 | 172180806 |
| 22 | 217198212 |
| 23 | 271178418 |