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 | 4 |
| 3 | 18 |
| 4 | 48 |
| 5 | 105 |
| 6 | 199 |
| 7 | 342 |
| 8 | 546 |
| 9 | 825 |
| 10 | 1204 |
| 11 | 1685 |
| 12 | 2300 |
| 13 | 3068 |
| 14 | 4008 |
| 15 | 5143 |
| 16 | 6488 |
| 17 | 8091 |
| 18 | 9956 |
| 19 | 12115 |
| 20 | 14605 |
| 21 | 17446 |
| 22 | 20676 |
| 23 | 24322 |
| 24 | 28441 |
| 25 | 33004 |
| 26 | 38114 |
| 27 | 43805 |
| 28 | 50066 |
| 29 | 56951 |
| 30 | 64529 |
| 31 | 72830 |
| 32 | 81853 |
| 33 | 91751 |
| 34 | 102397 |
| 35 | 114004 |
| 36 | 126516 |
| 37 | 140016 |
| 38 | 154559 |
| 39 | 170186 |
| 40 | 186883 |
| 41 | 204880 |
| 42 | 224009 |
| 43 | 244527 |
| 44 | 266283 |
| 45 | 289506 |
| 46 | 314148 |
| 47 | 340292 |
| 48 | 368114 |
| 49 | 397407 |