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 | 79 |
| 4 | 479 |
| 5 | 5297 |
| 6 | 69071 |
| 7 | 69203 |
| 8 | 471181 |
| 9 | 8960447 |
| 10 | 44831407 |
| 11 | 1031626241 |
| 12 | 5160071143 |
| 13 | 15484789693 |
| 14 | 64166447971 |
| 15 | 1989542332021 |
| 16 | 3979714828967 |
| 17 | 27861681000449 |
| 18 | 1030996803010973 |
| 19 | 1031094241305773 |
| 20 | 42278288849598913 |
| 21 | 1818093633186492859 |
| 22 | 1818204269645957299 |
| 23 | 85460151199040573933 |