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 | 2 |
| 2 | 5 |
| 3 | 7 |
| 4 | 173 |
| 5 | 563 |
| 6 | 73 |
| 7 | 41 |
| 8 | 369581 |
| 9 | 1409 |
| 10 | 109 |
| 11 | 449 |
| 12 | 176459 |
| 13 | 44221 |
| 14 | 12148537 |
| 15 | 148381 |
| 16 | 11399977 |
| 17 | 5779337237 |
| 18 | 151431487 |
| 19 | 26013917 |
| 20 | 57405011 |
| 21 | 939783003793 |
| 22 | 277157 |
| 23 | 191141 |
| 24 | 13515438731 |
| 25 | 79702499 |
| 26 | 236463558839 |
| 27 | 1883371283883863 |
| 28 | 313527009031 |
| 29 | 138961158000728258971 |