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 | 5 |
| 2 | 15 |
| 3 | 165 |
| 4 | 20 |
| 5 | 525 |
| 6 | 195 |
| 7 | 1085 |
| 8 | 90 |
| 9 | 1845 |
| 10 | 575 |
| 11 | 2805 |
| 12 | 210 |
| 13 | 3965 |
| 14 | 1155 |
| 15 | 5325 |
| 16 | 380 |
| 17 | 6885 |
| 18 | 1935 |
| 19 | 8645 |
| 20 | 600 |
| 21 | 10605 |
| 22 | 2915 |
| 23 | 12765 |
| 24 | 870 |
| 25 | 15125 |
| 26 | 4095 |
| 27 | 17685 |
| 28 | 1190 |
| 29 | 20445 |
| 30 | 5475 |
| 31 | 23405 |
| 32 | 1560 |
| 33 | 26565 |
| 34 | 7055 |
| 35 | 29925 |
| 36 | 1980 |
| 37 | 33485 |
| 38 | 8835 |
| 39 | 37245 |
| 40 | 2450 |