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 | 6 |
| 3 | 33 |
| 4 | 102 |
| 5 | 243 |
| 6 | 492 |
| 7 | 894 |
| 8 | 1500 |
| 9 | 2370 |
| 10 | 3570 |
| 11 | 5175 |
| 12 | 7266 |
| 13 | 9933 |
| 14 | 13272 |
| 15 | 17388 |
| 16 | 22392 |
| 17 | 28404 |
| 18 | 35550 |
| 19 | 43965 |
| 20 | 53790 |
| 21 | 65175 |
| 22 | 78276 |
| 23 | 93258 |
| 24 | 110292 |
| 25 | 129558 |
| 26 | 151242 |
| 27 | 175539 |
| 28 | 202650 |
| 29 | 232785 |
| 30 | 266160 |
| 31 | 303000 |
| 32 | 343536 |
| 33 | 388008 |
| 34 | 436662 |
| 35 | 489753 |
| 36 | 547542 |
| 37 | 610299 |
| 38 | 678300 |
| 39 | 751830 |
| 40 | 831180 |
| 41 | 916650 |
| 42 | 1008546 |
| 43 | 1107183 |
| 44 | 1212882 |
| 45 | 1325973 |
| 46 | 1446792 |
| 47 | 1575684 |
| 48 | 1713000 |
| 49 | 1859100 |
| 50 | 2014350 |