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 | 7 |
| 3 | 17 |
| 4 | 37 |
| 5 | 157 |
| 6 | 317 |
| 7 | 1277 |
| 8 | 2557 |
| 9 | 20477 |
| 10 | 655357 |
| 11 | 5242877 |
| 12 | 671088637 |
| 13 | 2684354557 |
| 14 | 5368709117 |
| 15 | 343597383677 |
| 16 | 23058430092136939517 |
| 17 | 23611832414348226068477 |
| 18 | 48357032784585166988247037 |
| 19 | 830767497365572420564879412675215357 |