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 | 3 |
| 2 | 13 |
| 3 | 31 |
| 4 | 139 |
| 5 | 193 |
| 6 | 409 |
| 7 | 499 |
| 8 | 823 |
| 9 | 1381 |
| 10 | 1543 |
| 11 | 2083 |
| 12 | 2281 |
| 13 | 3163 |
| 14 | 3919 |
| 15 | 6673 |
| 16 | 7753 |
| 17 | 9319 |
| 18 | 9733 |
| 19 | 17581 |
| 20 | 19309 |
| 21 | 21739 |
| 22 | 22369 |
| 23 | 24979 |
| 24 | 27031 |
| 25 | 27733 |
| 26 | 30631 |
| 27 | 39343 |
| 28 | 40189 |
| 29 | 51043 |
| 30 | 53959 |
| 31 | 54949 |
| 32 | 57973 |
| 33 | 62131 |
| 34 | 67531 |
| 35 | 70879 |
| 36 | 81409 |
| 37 | 85081 |
| 38 | 86323 |
| 39 | 91381 |