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 | 1 |
| 2 | 21 |
| 3 | 121 |
| 4 | 421 |
| 5 | 1101 |
| 6 | 2401 |
| 7 | 4621 |
| 8 | 8121 |
| 9 | 13321 |
| 10 | 20701 |
| 11 | 30801 |
| 12 | 44221 |
| 13 | 61621 |
| 14 | 83721 |
| 15 | 111301 |
| 16 | 145201 |
| 17 | 186321 |
| 18 | 235621 |
| 19 | 294121 |
| 20 | 362901 |
| 21 | 443101 |
| 22 | 535921 |
| 23 | 642621 |
| 24 | 764521 |
| 25 | 903001 |
| 26 | 1059501 |
| 27 | 1235521 |
| 28 | 1432621 |
| 29 | 1652421 |
| 30 | 1896601 |
| 31 | 2166901 |
| 32 | 2465121 |
| 33 | 2793121 |
| 34 | 3152821 |