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 | 21 |
| 2 | 377 |
| 3 | 610 |
| 4 | 2584 |
| 5 | 17711 |
| 6 | 75025 |
| 7 | 196418 |
| 8 | 514229 |
| 9 | 63245986 |
| 10 | 701408733 |
| 11 | 1134903170 |
| 12 | 1836311903 |
| 13 | 2971215073 |
| 14 | 17167680177565 |
| 15 | 72723460248141 |
| 16 | 117669030460994 |
| 17 | 2880067194370816120 |
| 18 | 19740274219868223167 |
| 19 | 354224848179261915075 |
| 20 | 1500520536206896083277 |