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 | 20 |
| 3 | 207 |
| 4 | 944 |
| 5 | 2975 |
| 6 | 7524 |
| 7 | 16415 |
| 8 | 32192 |
| 9 | 58239 |
| 10 | 98900 |
| 11 | 159599 |
| 12 | 246960 |
| 13 | 368927 |
| 14 | 534884 |
| 15 | 755775 |
| 16 | 1044224 |
| 17 | 1414655 |
| 18 | 1883412 |
| 19 | 2468879 |
| 20 | 3191600 |
| 21 | 4074399 |
| 22 | 5142500 |
| 23 | 6423647 |
| 24 | 7948224 |
| 25 | 9749375 |
| 26 | 11863124 |
| 27 | 14328495 |
| 28 | 17187632 |
| 29 | 20485919 |
| 30 | 24272100 |
| 31 | 28598399 |
| 32 | 33520640 |
| 33 | 39098367 |
| 34 | 45394964 |