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 | 5 |
| 2 | 15 |
| 3 | 85 |
| 4 | 165 |
| 5 | 235 |
| 6 | 485 |
| 7 | 1665 |
| 8 | 1885 |
| 9 | 4835 |
| 10 | 5765 |
| 11 | 7585 |
| 12 | 15085 |
| 13 | 15885 |
| 14 | 16665 |
| 15 | 18365 |
| 16 | 18915 |
| 17 | 22885 |
| 18 | 27115 |
| 19 | 27885 |
| 20 | 50235 |
| 21 | 57665 |
| 22 | 58115 |
| 23 | 72335 |
| 24 | 85635 |
| 25 | 87885 |
| 26 | 150915 |
| 27 | 166665 |
| 28 | 182415 |
| 29 | 194235 |
| 30 | 194365 |
| 31 | 229635 |
| 32 | 240365 |
| 33 | 268835 |
| 34 | 503515 |
| 35 | 507665 |
| 36 | 524915 |
| 37 | 568835 |
| 38 | 570415 |
| 39 | 577515 |
| 40 | 581165 |