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 | 7 |
| 2 | 19 |
| 3 | 79 |
| 4 | 607 |
| 5 | 9907 |
| 6 | 20599 |
| 7 | 65287 |
| 8 | 104659 |
| 9 | 129967 |
| 10 | 331207 |
| 11 | 1047559 |
| 12 | 1184839 |
| 13 | 1872799 |
| 14 | 3746167 |
| 15 | 4098607 |
| 16 | 6762607 |
| 17 | 7308919 |
| 18 | 11313139 |
| 19 | 20146639 |
| 20 | 21376759 |
| 21 | 28392919 |
| 22 | 43040167 |
| 23 | 54693427 |
| 24 | 59961799 |
| 25 | 84925447 |
| 26 | 104050207 |
| 27 | 108232819 |
| 28 | 131068159 |
| 29 | 168883027 |
| 30 | 187375039 |