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 | 71000000007 |
| 2 | 971000000097 |
| 3 | 1031000000103 |
| 4 | 1811000000181 |
| 5 | 2231000000223 |
| 6 | 2411000000241 |
| 7 | 2711000000271 |
| 8 | 3491000000349 |
| 9 | 4091000000409 |
| 10 | 4331000000433 |
| 11 | 4391000000439 |
| 12 | 6071000000607 |
| 13 | 6131000000613 |
| 14 | 7871000000787 |
| 15 | 8291000000829 |