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 | 6 |
| 3 | 21 |
| 4 | 55 |
| 5 | 119 |
| 6 | 227 |
| 7 | 396 |
| 8 | 645 |
| 9 | 996 |
| 10 | 1474 |
| 11 | 2106 |
| 12 | 2922 |
| 13 | 3955 |
| 14 | 5240 |
| 15 | 6815 |
| 16 | 8721 |
| 17 | 11001 |
| 18 | 13701 |
| 19 | 16870 |
| 20 | 20559 |
| 21 | 24822 |
| 22 | 29716 |
| 23 | 35300 |
| 24 | 41636 |
| 25 | 48789 |
| 26 | 56826 |
| 27 | 65817 |
| 28 | 75835 |
| 29 | 86955 |
| 30 | 99255 |
| 31 | 112816 |
| 32 | 127721 |
| 33 | 144056 |
| 34 | 161910 |
| 35 | 181374 |
| 36 | 202542 |
| 37 | 225511 |
| 38 | 250380 |
| 39 | 277251 |
| 40 | 306229 |