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 | 31 |
| 2 | 131 |
| 3 | 151 |
| 4 | 155 |
| 5 | 631 |
| 6 | 651 |
| 7 | 655 |
| 8 | 751 |
| 9 | 755 |
| 10 | 775 |
| 11 | 3131 |
| 12 | 3151 |
| 13 | 3155 |
| 14 | 3251 |
| 15 | 3255 |
| 16 | 3275 |
| 17 | 3751 |
| 18 | 3755 |
| 19 | 3775 |
| 20 | 3875 |
| 21 | 15631 |
| 22 | 15651 |
| 23 | 15655 |
| 24 | 15751 |
| 25 | 15755 |
| 26 | 15775 |
| 27 | 16251 |
| 28 | 16255 |
| 29 | 16275 |
| 30 | 16375 |
| 31 | 18751 |
| 32 | 18755 |
| 33 | 18775 |
| 34 | 18875 |
| 35 | 19375 |
| 36 | 78131 |
| 37 | 78151 |
| 38 | 78155 |
| 39 | 78251 |
| 40 | 78255 |
| 41 | 78275 |
| 42 | 78751 |