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 | 0 |
| 3 | 3 |
| 4 | 6 |
| 5 | 15 |
| 6 | 24 |
| 7 | 39 |
| 8 | 54 |
| 9 | 71 |
| 10 | 98 |
| 11 | 123 |
| 12 | 156 |
| 13 | 195 |
| 14 | 234 |
| 15 | 275 |
| 16 | 322 |
| 17 | 379 |
| 18 | 434 |
| 19 | 497 |
| 20 | 566 |
| 21 | 633 |
| 22 | 708 |
| 23 | 785 |
| 24 | 866 |
| 25 | 959 |
| 26 | 1058 |
| 27 | 1157 |
| 28 | 1262 |
| 29 | 1367 |
| 30 | 1466 |
| 31 | 1589 |
| 32 | 1714 |
| 33 | 1849 |
| 34 | 1978 |
| 35 | 2125 |
| 36 | 2270 |
| 37 | 2421 |
| 38 | 2580 |
| 39 | 2741 |
| 40 | 2908 |
| 41 | 3085 |
| 42 | 3256 |
| 43 | 3445 |
| 44 | 3634 |
| 45 | 3829 |
| 46 | 4016 |
| 47 | 4215 |
| 48 | 4434 |
| 49 | 4659 |
| 50 | 4884 |