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 | 11 |
| 3 | 19 |
| 4 | 89 |
| 5 | 151 |
| 6 | 701 |
| 7 | 1189 |
| 8 | 5519 |
| 9 | 9361 |
| 10 | 43451 |
| 11 | 73699 |
| 12 | 342089 |
| 13 | 580231 |
| 14 | 2693261 |
| 15 | 4568149 |
| 16 | 21203999 |
| 17 | 35964961 |
| 18 | 166938731 |
| 19 | 283151539 |
| 20 | 1314305849 |
| 21 | 2229247351 |
| 22 | 10347508061 |
| 23 | 17550827269 |
| 24 | 81465758639 |
| 25 | 138177370801 |
| 26 | 641378561051 |
| 27 | 1087868139139 |
| 28 | 5049562729769 |