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 | -1 |
| 1 | 15 |
| 2 | 55 |
| 3 | 119 |
| 4 | 207 |
| 5 | 319 |
| 6 | 455 |
| 7 | 615 |
| 8 | 799 |
| 9 | 1007 |
| 10 | 1239 |
| 11 | 1495 |
| 12 | 1775 |
| 13 | 2079 |
| 14 | 2407 |
| 15 | 2759 |
| 16 | 3135 |
| 17 | 3535 |
| 18 | 3959 |
| 19 | 4407 |
| 20 | 4879 |
| 21 | 5375 |
| 22 | 5895 |
| 23 | 6439 |
| 24 | 7007 |
| 25 | 7599 |
| 26 | 8215 |
| 27 | 8855 |
| 28 | 9519 |
| 29 | 10207 |
| 30 | 10919 |
| 31 | 11655 |
| 32 | 12415 |
| 33 | 13199 |
| 34 | 14007 |
| 35 | 14839 |
| 36 | 15695 |
| 37 | 16575 |
| 38 | 17479 |
| 39 | 18407 |