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 | 4 |
| 3 | 19 |
| 4 | 107 |
| 5 | 39 |
| 6 | 61 |
| 7 | 259 |
| 8 | 89 |
| 9 | 93 |
| 10 | 857 |
| 11 | 887 |
| 12 | 181 |
| 13 | 1303 |
| 14 | 331 |
| 15 | 1345 |
| 16 | 4091 |
| 17 | 4175 |
| 18 | 21127 |
| 19 | 4301 |
| 20 | 21757 |
| 21 | 87973 |
| 22 | 88813 |
| 23 | 90073 |
| 24 | 90577 |
| 25 | 1192621 |
| 26 | 1201981 |
| 27 | 1211809 |
| 28 | 1221637 |
| 29 | 1234741 |
| 30 | 1240201 |
| 31 | 626243 |
| 32 | 89909 |
| 33 | 45247 |
| 34 | 15169 |
| 35 | 30533 |
| 36 | 153601 |
| 37 | 2941819 |
| 38 | 2956639 |
| 39 | 20807623 |
| 40 | 20876783 |