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 | 1 |
| 2 | 6 |
| 3 | 24 |
| 4 | 70 |
| 5 | 165 |
| 6 | 336 |
| 7 | 616 |
| 8 | 1044 |
| 9 | 1665 |
| 10 | 2530 |
| 11 | 3696 |
| 12 | 5226 |
| 13 | 7189 |
| 14 | 9660 |
| 15 | 12720 |
| 16 | 16456 |
| 17 | 20961 |
| 18 | 26334 |
| 19 | 32680 |
| 20 | 40110 |
| 21 | 48741 |
| 22 | 58696 |
| 23 | 70104 |
| 24 | 83100 |
| 25 | 97825 |
| 26 | 114426 |
| 27 | 133056 |
| 28 | 153874 |
| 29 | 177045 |
| 30 | 202740 |
| 31 | 231136 |
| 32 | 262416 |
| 33 | 296769 |
| 34 | 334390 |
| 35 | 375480 |
| 36 | 420246 |
| 37 | 468901 |
| 38 | 521664 |
| 39 | 578760 |