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 | 0 |
| 1 | 0 |
| 2 | 14 |
| 3 | 78 |
| 4 | 252 |
| 5 | 620 |
| 6 | 1290 |
| 7 | 2394 |
| 8 | 4088 |
| 9 | 6552 |
| 10 | 9990 |
| 11 | 14630 |
| 12 | 20724 |
| 13 | 28548 |
| 14 | 38402 |
| 15 | 50610 |
| 16 | 65520 |
| 17 | 83504 |
| 18 | 104958 |
| 19 | 130302 |
| 20 | 159980 |
| 21 | 194460 |
| 22 | 234234 |
| 23 | 279818 |
| 24 | 331752 |
| 25 | 390600 |
| 26 | 456950 |
| 27 | 531414 |
| 28 | 614628 |
| 29 | 707252 |
| 30 | 809970 |
| 31 | 923490 |
| 32 | 1048544 |
| 33 | 1185888 |
| 34 | 1336302 |
| 35 | 1500590 |
| 36 | 1679580 |