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 | 2 |
| 3 | 13 |
| 4 | 23 |
| 5 | 116 |
| 6 | 263 |
| 7 | 369 |
| 8 | 663 |
| 9 | 1202 |
| 10 | 1263 |
| 11 | 2093 |
| 12 | 9893 |
| 13 | 12209 |
| 14 | 12896 |
| 15 | 12983 |
| 16 | 21503 |
| 17 | 30609 |
| 18 | 33603 |
| 19 | 38993 |
| 20 | 120603 |
| 21 | 210703 |
| 22 | 218906 |
| 23 | 219803 |
| 24 | 368903 |
| 25 | 1202009 |
| 26 | 1208906 |
| 27 | 1209803 |
| 28 | 2105003 |
| 29 | 3006009 |
| 30 | 3036003 |
| 31 | 3089903 |
| 32 | 12006003 |
| 33 | 21007003 |
| 34 | 21089006 |
| 35 | 21098003 |
| 36 | 30689003 |
| 37 | 120020009 |
| 38 | 120089006 |
| 39 | 120098003 |