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 | 9 |
| 3 | 13 |
| 4 | 41 |
| 5 | 49 |
| 6 | 101 |
| 7 | 113 |
| 8 | 189 |
| 9 | 205 |
| 10 | 305 |
| 11 | 325 |
| 12 | 449 |
| 13 | 473 |
| 14 | 621 |
| 15 | 649 |
| 16 | 821 |
| 17 | 853 |
| 18 | 1049 |
| 19 | 1085 |
| 20 | 1305 |
| 21 | 1345 |
| 22 | 1589 |
| 23 | 1633 |
| 24 | 1901 |
| 25 | 1949 |
| 26 | 2241 |
| 27 | 2293 |
| 28 | 2609 |
| 29 | 2665 |
| 30 | 3005 |
| 31 | 3065 |
| 32 | 3429 |
| 33 | 3493 |
| 34 | 3881 |
| 35 | 3949 |
| 36 | 4361 |
| 37 | 4433 |
| 38 | 4869 |
| 39 | 4945 |
| 40 | 5405 |
| 41 | 5485 |
| 42 | 5969 |
| 43 | 6053 |
| 44 | 6561 |
| 45 | 6649 |
| 46 | 7181 |
| 47 | 7273 |