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 | 1 |
| 2 | 7 |
| 3 | 19 |
| 4 | 39 |
| 5 | 69 |
| 6 | 111 |
| 7 | 167 |
| 8 | 239 |
| 9 | 329 |
| 10 | 439 |
| 11 | 571 |
| 12 | 727 |
| 13 | 909 |
| 14 | 1119 |
| 15 | 1359 |
| 16 | 1631 |
| 17 | 1937 |
| 18 | 2279 |
| 19 | 2659 |
| 20 | 3079 |
| 21 | 3541 |
| 22 | 4047 |
| 23 | 4599 |
| 24 | 5199 |
| 25 | 5849 |
| 26 | 6551 |
| 27 | 7307 |
| 28 | 8119 |
| 29 | 8989 |
| 30 | 9919 |
| 31 | 10911 |
| 32 | 11967 |
| 33 | 13089 |
| 34 | 14279 |
| 35 | 15539 |
| 36 | 16871 |
| 37 | 18277 |
| 38 | 19759 |
| 39 | 21319 |
| 40 | 22959 |
| 41 | 24681 |
| 42 | 26487 |
| 43 | 28379 |
| 44 | 30359 |
| 45 | 32429 |
| 46 | 34591 |
| 47 | 36847 |
| 48 | 39199 |
| 49 | 41649 |